ar-

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English[edit]

Etymology 1[edit]

Extracted from the word aromatic.

Prefix[edit]

ar-

  1. (organic chemistry) Forming classification names for classes of organic compounds that contain a carbon skeleton and one or more aromatic rings.
    • 1900, Edgar Fahs Smith (English translator), R. Anschütz (German editor), Victor von Richter's Organic Chemistry: or, Chemistry of the Carbon Compounds, Third American Edition, Volume II, P. Blakiston's Son & Co., page 393:
      Potassium permanganate oxidizes ac-tetrahydronaphtylamine to o-hydrocinnam-carboxylic acid (p. 245); ar-tetrahydronaphthylamine, however, because of the oxidation of its amided benzene nucleus, is changed to adipic acid together with oxalic acid (B. 22, 767): []
    • 1919 January 10, C. J. West, abstract of G. Schroeter and K. Thomas, “Transformation of tetrahydronaphthalene (tetralin) in the animal body”; in American Chemical Society, Chemical Abstracts, Volume 13, Number 1, page 43:
      ar-Tetrahydro-α-carbamidonaphthalene, C11H14ON2, crystallized in square plates from alc., soften at 198° and melts at about 206° (quickly heated, at 212°).
    • 2006, Amit Arora, Aromatic Organic Chemistry, Discovery Publishing House (2007), →ISBN, page 173:
      1-Naphthylamine is reduced by sodium and isopentanol to ar-tetrahydro-1-naphthylamine; the prefix ar- is the abbreviation of aromatic and indicates that the four hydrogen atoms are not in the ring containing the amino-group: []

Etymology 2[edit]

Shortened from area (because the function describes the area under a hyperbola), by analogy with arc-, the corresponding prefix for the circular trigonomic functions.

Prefix[edit]

ar-

  1. (mathematics, trigonometry) Used to form the names of inverse hyperbolic trigonometric functions, and the symbols for these functions.
    Synonyms: (sometimes proscribed) arc-, a-, −1

References[edit]

Anagrams[edit]


Aka-Bea[edit]

Prefix[edit]

ar-

  1. prefix for limbs or upright things

Old Irish[edit]

Etymology[edit]

From Proto-Celtic *ɸare-. Prefix form of ar (in front of).

Prefix[edit]

ar-

  1. for-, fore-

Derived terms[edit]


Welsh[edit]

Etymology[edit]

From Proto-Brythonic *ar-, from Proto-Celtic *ɸare.[1]

Pronunciation[edit]

Prefix[edit]

ar-

  1. on, above, sur-, super-, epi-
    ar- + ‎nofio (to swim) → ‎arnofio (to float)
    ar- + ‎ysgrif (writing) → ‎arysgrif (inscription, epigraph)
  2. near
    ar- + ‎lliw (colour) → ‎arlliw (shade)
    ar- + ‎môr (sea) → ‎arfor (coast)

Derived terms[edit]

Mutation[edit]

Welsh mutation
radical soft nasal h-prothesis
ar- unchanged unchanged har-
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.

Further reading[edit]

  • R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “ar-”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies

References[edit]

  1. ^ Morris Jones, John (1913) A Welsh Grammar, Historical and Comparative, Oxford: Clarendon Press, § 156 i (6)