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(index pi)


pilkka (mark) +‎ -u; first adopted to mean "comma" by Finnish physician and translator Erik Alexander Ingman.


  • IPA(key): /ˈpilkːu/, [ˈpilkːu]
  • Rhymes: -ilkːu
  • Syllabification: pilk‧ku


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  1. comma (punctuation mark ,)
  2. (mathematics) dot (symbol , used for separating the fractional part of a decimal number from the whole part)
  3. spot, dot (small spot or mark)
  4. (slang) hashish (cannabis extract)
  5. (colloquial) last call
  6. (colloquial, sports) penalty kick, penalty shot
  7. (mathematics) prime (symbol ′, as in x′)


Inflection of pilkku (Kotus type 1/valo, kk-k gradation)
nominative pilkku pilkut
genitive pilkun pilkkujen
partitive pilkkua pilkkuja
illative pilkkuun pilkkuihin
singular plural
nominative pilkku pilkut
accusative nom. pilkku pilkut
gen. pilkun
genitive pilkun pilkkujen
partitive pilkkua pilkkuja
inessive pilkussa pilkuissa
elative pilkusta pilkuista
illative pilkkuun pilkkuihin
adessive pilkulla pilkuilla
ablative pilkulta pilkuilta
allative pilkulle pilkuille
essive pilkkuna pilkkuina
translative pilkuksi pilkuiksi
instructive pilkuin
abessive pilkutta pilkuitta
comitative pilkkuineen
Possessive forms of pilkku (type valo)
possessor singular plural
1st person pilkkuni pilkkumme
2nd person pilkkusi pilkkunne
3rd person pilkkunsa

Usage notes[edit]

In English-speaking countries dot ( . ) is used to separate decimals from the whole part and comma (, ) to separate powers of three, whereas in Finland along with most of continental Europe their roles are reversed. Due to English influence, in speech the "decimal comma" is sometimes read as piste (dot).


Derived terms[edit]


Related terms[edit]