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ar-. In DICTIOUS you will not only get to know all the dictionary meanings for the word
ar-, but we will also tell you about its etymology, its characteristics and you will know how to say
ar- in singular and plural. Everything you need to know about the word
ar- you have here. The definition of the word
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English
Etymology 1
Extracted from the word aromatic.
Prefix
ar-
- (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, published 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
Shortened from area (because the function describes the area under a hyperbola), by analogy with arc-, the corresponding prefix for the circular trigonometric functions.
Prefix
ar-
- (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
Anagrams
Aka-Bea
Prefix
ar-
- prefix for limbs or upright things
Old Irish
Etymology
From Proto-Celtic *ɸare-. Prefix form of ar (“in front of”).
Pronunciation
- (pretonically) IPA(key): /ar/
- (in stressed syllables) IPA(key): /œr/
Prefix
ar-
- for-, fore-
Derived terms
Tocharian A
Etymology
From Proto-Tocharian *er- (whence also Tocharian B er-), from Proto-Indo-European *h₃er- (“to move, stir”).
Verb
ar-
- to evoke, call up
- to produce, yield, bring forth
Welsh
Alternative forms
Etymology
From Proto-Brythonic *ar-, from Proto-Celtic *ɸare.
Pronunciation
Prefix
ar-
- on, above, sur-, super-, epi-
- ar- + nofio (“to swim”) → arnofio (“to float”)
- ar- + ysgrif (“writing”) → arysgrif (“inscription, epigraph”)
- near
- ar- + lliw (“colour”) → arlliw (“shade”)
- ar- + môr (“sea”) → arfor (“coast”)
Derived terms
Mutation
References
Further reading
- 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