tau

Definition from Wiktionary, the free dictionary
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See also: Tau, tàu, Tàu, tãu, tău, taʻu, ta'u, täü, and тау

English[edit]

Ancient Greek Alphabet

sigma
Greek uc tau.svgGreek lc tau.png
upsilon
Τ τ
Ancient Greek: ταῦ
Wikipedia article on tau
When a circle's radius is 1 unit, its circumference is τ units.

Etymology[edit]

Borrowed from Ancient Greek ταῦ (taû). The physics sense was coined by American physicist Martin Perl.

Pronunciation[edit]

  • IPA(key): /taʊ/, /tɔː/
  • (file)
  • Rhymes: -aʊ, -ɔː

Noun[edit]

tau (plural taus)

  1. The letter Τ/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek.
  2. A Τ-shaped sign or structure; a Saint Anthony's cross, sometimes regarded as a sacred symbol.
    • 1658: Nor shall we take in the mysticall Tau, or the Crosse of our blessed Saviour, which having in some descriptions an Empedon or crossing foot-stay, made not one single transversion. — Sir Thomas Browne, The Garden of Cyrus (Folio Society 2007, p. 168)
  3. (physics, dated) A tau meson, now usually known as a kaon.
  4. (physics) An unstable heavy lepton, which decays into a muon or electron; a tauon.
  5. (biology) Tau protein, a type of protein that stabilizes microtubules in the human central nervous system, failures of which are associated with forms of dementia.
    • 1999, Matt Ridley, Genome, Harper Perennial 2004, p. 263:
      Quite what that job is remains obscure, but one theory is that it is to stabilise another protein called tau, which is supposed in turn to keep in shape the tubular ‘skeleton’ of a neuron.
  6. (finance) A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
  7. (mathematics, neologism) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its radius, approximately 6.2831853071; equal to twice the value of pi. Often written τ or 2π.

Synonyms[edit]

  • (measure of derivative price sensitivity): kappa, vega

Hypernyms[edit]

  • (measure of derivative price sensitivity): Greeks (includes list of coordinate terms)

Coordinate terms[edit]

Derived terms[edit]

Translations[edit]

Further reading[edit]

Anagrams[edit]


'Are'are[edit]

Verb[edit]

tau

  1. to give

References[edit]


Catalan[edit]

Pronunciation[edit]

Noun[edit]

tau f (plural taus)

  1. Tau; the Greek letter Τ (lowercase τ).
  2. Tav; the Hebrew letter ת‎.
  3. (religion) A tau cross.

Czech[edit]

Pronunciation[edit]

Noun[edit]

tau n

  1. tau (Greek letter)

Further reading[edit]


Finnish[edit]

Etymology[edit]

Borrowed from Ancient Greek ταῦ (taû).

Greek letter
Ττ Previous: sigma
Next: ypsilon
Finnish Wikipedia has an article on:
Wikipedia fi

Pronunciation[edit]

  • IPA(key): /ˈtɑu̯/, [ˈt̪ɑu̯]
  • Rhymes: -ɑu
  • Syllabification: tau

Noun[edit]

tau

  1. tau (Greek letter)
  2. tauon, tau (elementary particle)

Declension[edit]

Inflection of tau (Kotus type 21/rosé, no gradation)
nominative tau taut
genitive taun tauiden
tauitten
partitive tauta tauita
illative tauhun tauihin
singular plural
nominative tau taut
accusative nom. tau taut
gen. taun
genitive taun tauiden
tauitten
partitive tauta tauita
inessive taussa tauissa
elative tausta tauista
illative tauhun tauihin
adessive taulla tauilla
ablative taulta tauilta
allative taulle tauille
essive tauna tauina
translative tauksi tauiksi
instructive tauin
abessive tautta tauitta
comitative tauineen
Possessive forms of tau (type rosé)
possessor singular plural
1st person tauni taumme
2nd person tausi taunne
3rd person taunsa

Anagrams[edit]


French[edit]

Alternative forms[edit]

Pronunciation[edit]

Noun[edit]

tau m (plural tau or taus)

  1. tau (Greek letter)
  2. (physics) tau, tauon

Derived terms[edit]

Further reading[edit]

Anagrams[edit]


German Low German[edit]

Alternative forms[edit]

  • to (in some dialects)

Etymology[edit]

Middle Low German .

Preposition[edit]

tau

  1. (in some dialects) to

Derived terms[edit]


Huichol[edit]

Noun[edit]

tau

  1. sun

Hungarian[edit]

Hungarian Wikipedia has an article on:
Wikipedia hu

Etymology[edit]

From Ancient Greek ταῦ (taû).

Pronunciation[edit]

  • IPA(key): [ˈtɒu]
  • Hyphenation: tau
  • Rhymes: -u

Noun[edit]

tau (plural tauk)

  1. tau (Greek letter)

Declension[edit]

Inflection (stem in long/high vowel, back harmony)
singular plural
nominative tau tauk
accusative taut taukat
dative taunak tauknak
instrumental tauval taukkal
causal-final tauért taukért
translative tauvá taukká
terminative tauig taukig
essive-formal tauként taukként
essive-modal
inessive tauban taukban
superessive taun taukon
adessive taunál tauknál
illative tauba taukba
sublative taura taukra
allative tauhoz taukhoz
elative tauból taukból
delative tauról taukról
ablative tautól tauktól
non-attributive
possessive - singular
taué tauké
non-attributive
possessive - plural
tauéi taukéi
Possessive forms of tau
possessor single possession multiple possessions
1st person sing. taum tauim
2nd person sing. taud tauid
3rd person sing. tauja taui
1st person plural taunk tauink
2nd person plural tautok tauitok
3rd person plural taujuk tauik

Icelandic[edit]

Etymology[edit]

Borrowed from Danish tøj.

Pronunciation[edit]

Noun[edit]

tau n (genitive singular taus, no plural)

  1. fabric
  2. clothing

Declension[edit]


Indonesian[edit]

Etymology 1[edit]

Pronunciation[edit]

  • IPA(key): /ta.ʊ/
  • Hyphenation: ta.u

Verb[edit]

tau

  1. Nonstandard spelling of tahu.

Etymology 2[edit]

Pronunciation[edit]

Noun[edit]

tau

  1. the Greek letter tau (Τ or τ)

Further reading[edit]


Italian[edit]

Noun[edit]

Italian Wikipedia has an article on:
Wikipedia it

tau m or f (invariable)

  1. tau (Greek letter)

Anagrams[edit]


Japanese[edit]

Romanization[edit]

tau

  1. Rōmaji transcription of たう

Kambera[edit]

Verb[edit]

tau

  1. person
    na tau na pa-hi dà-nggu
    the person that I cried with

References[edit]

  • Marian Klamer (1998) A Grammar of Kambera, Berlin, New York: Mouton de Gruyter, →ISBN, page 328



Kapampangan[edit]

Etymology[edit]

Ultimately from Proto-Austronesian *Cau

Noun[edit]

tau

  1. person
  2. human

Lithuanian[edit]

Pronoun[edit]

tau

  1. (second-person singular) dative form of tu.

Malay[edit]

Alternative forms[edit]

Etymology 1[edit]

From Proto-Malayic *tahu(ʔ), from Proto-Malayo-Chamic, from Proto-Malayo-Sumbawan, from Proto-Malayo-Polynesian *taqu, from Proto-Austronesian *Caqu.

Pronunciation[edit]

Verb[edit]

tau

  1. Nonstandard spelling of tahu.

Etymology 2[edit]

Borrowed from English tau, from Ancient Greek ταῦ (taû).

Pronunciation[edit]

Noun[edit]

tau (Jawi spelling تاو‎, plural tau-tau, informal 1st possessive tauku, impolite 2nd possessive taumu, 3rd possessive taunya)

  1. the Greek letter tau (Τ or τ)

Further reading[edit]


Maori[edit]

Etymology 1[edit]

From Proto-Polynesian *taqu, from Proto-Oceanic, from Proto-Malayo-Polynesian *taqun.

Noun[edit]

tau

  1. year (time it takes for the Earth to complete one revolution of the Sun)
  2. year (time it takes for any planetary body to make one revolution around another body)
  3. year (a period between set dates that mark a year)
  4. year (scheduled part of a calendar year spent in a specific activity)
  5. year (Julian year)
  6. year (level or grade at school or college)

Etymology 2[edit]

From Proto-Polynesian *tau, from Proto-Oceanic, from Proto-Malayo-Polynesian *taʀuq.

Verb[edit]

tau

  1. to settle

Etymology 3[edit]

From Proto-Polynesian *tau, from Proto-Oceanic, from Proto-Malayo-Polynesian *taqu, from Proto-Austronesian *Caqu.

Noun[edit]

tau (used in the form mātau)

  1. knowledge

Verb[edit]

tau (used in the form mātau)

  1. (stative) to know

References[edit]

  • tau” in John C. Moorfield, Te Aka: Maori-English, English-Maori Dictionary and Index, 3rd edition, Longman/Pearson Education New Zealand, 2011, →ISBN.

Min Nan[edit]

For pronunciation and definitions of tau – see (“home; nearby”).
(This character, tau, is the Pe̍h-ōe-jī form of .)

Minangkabau[edit]

Etymology[edit]

From Proto-Malayic *tahu(ʔ), from Proto-Malayo-Chamic, from Proto-Malayo-Sumbawan, from Proto-Malayo-Polynesian *taqu, from Proto-Austronesian *Caqu.

Verb[edit]

tau

  1. to know

Niuean[edit]

Etymology 1[edit]

From Proto-Polynesian *taqu, from Proto-Oceanic, from Proto-Malayo-Polynesian *taqun.

Noun[edit]

tau

  1. year (time it takes for the Earth to complete one revolution of the Sun)
  2. year (time it takes for any planetary body to make one revolution around another body)
  3. year (a period between set dates that mark a year)
  4. year (scheduled part of a calendar year spent in a specific activity)
  5. year (Julian year)
  6. year (level or grade at school or college)

Etymology 2[edit]

From Proto-Polynesian *tau, from Proto-Oceanic, from Proto-Malayo-Polynesian *taʀuŋ.

Verb[edit]

tau

  1. fight

North Frisian[edit]

North Frisian cardinal numbers
 <  1 2 3  > 
    Cardinal : tau
    Ordinal : öler

Etymology[edit]

From Old Frisian twā. Compare Mooring North Frisian twäär, tou.

Pronunciation[edit]

IPA(key): /tau/

Numeral[edit]

tau

  1. (Föhr-Amrum, Heligoland, Sylt) two

Coordinate terms[edit]


Norwegian Bokmål[edit]

Norwegian Wikipedia has an article on:
Wikipedia no

Etymology 1[edit]

From Old Norse tog (rope)

Noun[edit]

tau n (definite singular tauet, indefinite plural tau, definite plural taua or tauene)

  1. a rope
  2. (physics) tau lepton
  3. tau (Greek letter)
Synonyms[edit]
Derived terms[edit]

Etymology 2[edit]

Verb[edit]

tau

  1. imperative of taue

References[edit]


Norwegian Nynorsk[edit]

Norwegian Nynorsk Wikipedia has an article on:
Wikipedia nn

Etymology 1[edit]

From earlier and Old Norse tog (rope), from Proto-Germanic *taugō.

Alternative forms[edit]

Noun[edit]

tau n (definite singular tauet, indefinite plural tau, definite plural taua)

  1. a rope
Synonyms[edit]
Derived terms[edit]

Etymology 2[edit]

Norwegian Nynorsk Wikipedia has an article on:
Wikipedia nn

Borrowed from Ancient Greek ταῦ (taû).

Noun[edit]

tau m (definite singular tauen, indefinite plural tauar, definite plural tauane)

  1. tau: The letter Τ/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek.
  2. (physics) tau lepton

References[edit]

Anagrams[edit]


Occitan[edit]

Etymology[edit]

From Latin talis.

Pronunciation[edit]

Adjective[edit]

tau m (feminine singular tala, masculine plural taus, feminine plural talas)

  1. (Gascony, Provençal, Limousin, Vivaro-alpine, Auvergne) such

Dialectal variants[edit]


Portuguese[edit]

Noun[edit]

tau m (plural taus)

  1. tau (name of the Greek letter Τ, τ)
  2. (physics) tauon

Sotho[edit]

Noun[edit]

tau 9 or 10 (plural ditau)

  1. lion

Spanish[edit]

Pronunciation[edit]

  • IPA(key): /ˈtau/, [ˈt̪au̯]

Noun[edit]

tau f (plural taus)

  1. tau; the Greek letter Τ, τ
  2. tauon (elementary particle)
    Synonym: tauón

See also[edit]


Tahitian[edit]

Adjective[edit]

tau

  1. some

Synonyms[edit]

References[edit]


Tocharian B[edit]

Noun[edit]

tau

  1. a dry measure, roughly equivalent to ten quarts or 1.25 pecks

Tongan[edit]

Etymology[edit]

From Proto-Polynesian *tau, from Proto-Malayo-Polynesian *taʀuŋ.

Pronunciation[edit]

Verb[edit]

tau

  1. fight

Tswana[edit]

Pronunciation[edit]

Noun[edit]

tau 9/10 (plural ditau)

  1. lion

Vietnamese[edit]

Pronunciation[edit]

Pronoun[edit]

tau

  1. Central Vietnam form of tao (I/me)

Welsh[edit]

Pronunciation[edit]

Verb[edit]

tau

  1. (literary) third-person singular present indicative/future of tewi

Mutation[edit]

Welsh mutation
radical soft nasal aspirate
tau dau nhau thau
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.

White Hmong[edit]

Etymology[edit]

From Proto-Hmong *təuk, from Old Chinese (OC *tɯːɡ).

Pronunciation[edit]

Verb[edit]

tau

  1. to get, gain, obtain
  2. (used preverbally) perfective action marker
    Kuv tsis tau ua.I didn't do that.
  3. (used postverbally) potential mood marker
    Ua tau.May be done.

References[edit]

  • Heimbach, Ernest E. (1979) White Hmong — English Dictionary[1], SEAP Publications, →ISBN.
  • Ratliff, Martha (2010) Hmong-Mien Language History (Studies in Language Change; 8), Camberra, Australia: Pacific Linguistics, →ISBN.