| 释义 |
equational, a.|ɪˈkweɪʃənəl|
[f. prec. + -al1.]
1. Pertaining to, or involving the use of, equations.
1864W. Hipsley (title), Equational Arithmetic: Questions of Interest, Annuities, &c. 1880Athenæum 13 Nov. 636/3 A further theoretical aid in equational logic.
2. Mech. Of gearing, etc.: equalizing, adjusting; equational box (see quot.).
a1877Knight Dict. Mech. I. 807/2 Equational box... A differential gearing used in the bobbin and fly machine for the adjustment of different degrees of twist, for different yarns.
3. Biol. [tr. G. aequationstheilung ‘equation division’ (A. Weismann Ueber die Zahl der Richtungskörper (1887) ii. 42).] Of a division of the chromosomes in a cell: taking place longitudinally and resulting in two equal segments that are incorporated into the daughter nuclei.
1920W. E. Agar Cytol. 50 Now in a meiosis with tetrad formation of the Copepod type it follows that if both the joints represent division planes, one division must be longitudinal (or equational, since the resulting daughter chromosomes receive similar sets of chromatin elements), and the other division must be transverse (or reductional, since each resulting daughter chromosome receives only one half of the set of chromatin elements). 1949Darlington & Mather Elem. Genetics ii. 52 The distribution of the chiasmata in the pairing segment relative to the centromere and the differential segments then decides whether the first division is reductional for these segments or equational.
4. Gram. Of a sentence or phrase (see quots.).
1933Bloomfield Lang. xi. 173 The equational type [of sentence] was less common [in Latin] than in Russian: beātus ille ‘happy (is) he’. 1961R. B. Long Sentence & its Parts v. 115 The common-voice forms of be are reversible when be is a true equational verb. The worst thing is the lights. 1964Language XL. 272 ‘Equational sentence’ is a good term for a sentence containing a copula. 1964R. H. Robins Gen. Ling. vi. 234 In some languages a favourite, productive, sentence type is found beside those containing a verb, namely a noun + noun or a noun + adjective structure, with no verb required to complete it. This type, which is sometimes labelled equational, is found in Russian.
Hence eˈquationally adv., in an equational form; by the use of equations.
1881Jevons in Nature XXIII. 487 They [secondary propositions] obey exactly the same formal laws as primary propositions, and are of course expressed equationally. |