| 释义 |
▪ I. transversion1|trɑːnsˈvɜːʃən, træns-, -nz-|
[n. of action fr. L. transvert-ĕre to turn across, transvert; cf. conversion, inversion, etc.]
1. The action of turning across or athwart; intersection; a turning into something else, conversion, perversion, transformation; transposition. rare.
1656Blount Glossogr., Transversion, a turning away or crosse, a traversing, or going athwart. 1658Sir T. Browne Gard. Cyrus i. 96 Nor shall we take in the mystical Tau, or the Crosse of our blessed Saviour, which having in some descriptions an Empedon or crossing foot-stay, made not one single transversion. 1671[see next]. 1716–20Lett. fr. Mist's Jrnl. (1722) I. 9 As if they intended a Transversion of Christendom to its first Paganism. 1870Lowell Study Wind. 331 A transversion common with him.
2. Logic. (See quot. 1933.) Obs. or rare.
1890E. E. C. Jones Elements Logic xix. 143 These may be called Mixed Eductions, or Transversions. Ibid. 148 In Transversion, the most interesting points are that all Inferentials and Alternatives may..be fully and accurately expressed in Categorical form. 1933C. A. Mace Princ. Logic vii. 121 A transversion may be defined as an immediate inference from a proposition of one logical form to another proposition which contains the same ‘material content’ but is of a different logical form.
3. Molecular Biol. The occurrence in a nucleic acid of a purine in place of a pyrimidine or vice versa. Cf. transition 5.
1959E. Freese in Proc. Nat. Acad. Sci. XLV. 631 The mutagenic effect of the second kind involves the ‘transversion’ of a nucleotide pair, in which a purine is replaced by a pyrimidine. 1980Nature 8 May 82/2 All the point mutations are transversions in the second position of each of four codons.
▪ II. transˈversion2
[n. of action f. transverse v.2]
A turning into verse; concr. a metrical version of something.
(Quot. 1671 appears to combine this with prec.)
[1671Villiers (Dk. Buckhm.) Rehearsal i. (Arb.) 31 My first Rule is the Rule of Transversion, or Regula Duplex, Changing Verse into Prose, or Prose into verse.] 1796W. Taylor in Monthly Mag. I. 404 The following transversion of a passage from Ossian's Carthon, may give an idea of the practicability of such metres in the English tongue. 1898Q. Rev. Jan. 100 Bayes's rules for the composition of plays..—the rule of transversion for instance. |