| 释义 |
trinomial, a. and n.|traɪˈnəʊmɪəl|
[Formed with tri- after binomial, q.v.]
A. adj.
1. Math. Consisting of three terms, as an algebraical expression.
1704J. Harris Lex. Techn. I, Trinomial-Root, in Mathematicks, is a Root consisting of three parts connected together by the Sign +; as a + b + c. See Binomial. 1743Emerson Fluxions i. 83 The Fluents of the Trinomial or compound Binomial Fluxions. c1865Circ. Sc. I. 483/2 The..multiplier will be trinomial.
2. Nat. Hist. Consisting of three terms, the first being that of the genus, the second that of the species, the third that of the subspecies or variety, instead of the two former only; involving or characterized by three terms, as a system of nomenclature. (Cf. binomial A. 2.)
1865Darwin Lett. (1903) I. 474, I have sometimes..speculated on what nomenclature would come to, and concluded that it would be trinomial. 1884Nature 10 July 257/1 More than ten years ago..Dr. Coues, in his ‘Key to the North American Birds’, first began to adopt the trinomial nomenclature which is now so generally accepted by American ornithologists.
3. Of the names of married women (esp. in the U.S.): consisting of three elements, the given, maiden, and husband's surname; also applied to those known by this style, whereby the maiden name is in some measure retained.
1966Listener 2 June 806/3 A vast cast of trinominal cuckoos (Harriot Stanton Blatch, Carrie Chapman Catt, Elizabeth Gurley Flynn, Lucretia Coffin Mott, Rev. Anna Howard Shaw et aliae) flap across the stage, but hardly one is characterized by any human identifiable characteristic. 1981Economist 28 Nov. 107/2 Mary Boykin Chesnut—and the reader cannot begin too soon to accustom himself to trinomial appellations.
B. n.
1. Math. An expression consisting of three terms connected by + or -.
1674S. Jeake Arith. (1696) 294 If three Quantities be conjoyned, and but three, they are sometime called Trinomials. 1706W. Jones Syn. Palmar. Matheseos 171 To raise any Trinomial..to any given Power. c1865Circ. Sc. I. 473/1 The square of a binomial consists of three terms; that is, it is a trinomial.
2. Nat. Hist. The name of a subspecies or variety when composed of three terms (the names of the genus, species, and subspecies or variety).
1884Proc. Boston Soc. Nat. Hist. 19 Mar. 166 According to recent lists all names are to be trinomials, either through duplication or addition.
Hence triˈnomialism, the trinomial system of nomenclature, or the use of trinomial names (see A. 2); triˈnomialist, one who uses or advocates this system; trinomiˈality, the quality or character of being trinomial; triˈnomially adv., in a trinomial manner; by the use of trinomial names.
1884Academy 5 July 13/3 Dr. Coues..showed how useful ‘*trinomialism’ was in describing species which over the vast extent of North America varied to an extent hardly realised in the Old World. 1898Nature 30 June 196/2 Mr. Blanford has not yet brought himself to accept the principle of trinomialism for birds.
1884Proc. Boston Soc. Nat. Hist. 19 Mar. 168 Some *trinomialists disclaim responsibility for the repetition or duplication.
1891Cent. Dict., *Trinomiality.
1884Nature 10 July 257/2 There has been..a consensus of opinion..that they [the Yellow Wagtails] ought to be treated *trinomially. |