| 单词 |
reductional |
| 释义 |
reˈductional, a.
[f. reduction + -al1.]
Characterized by reduction. (spec. in Cytology: cf. reduction sense 11 e above). Hence reˈductionally adv.
1674S. Jeake Arith. (1696) 49 Reductional Operation ended, Probation follows. 1816–30Bentham Offic. Apt. Maximized, Extract Const. Code (1830) 45 Each bidding will be either reductional, or emptional, or compound. 1903Biol. Bull. IV. 266 Van Winiwarter..considers it probable that one of these divisions is reductional. 1905Proc. Acad. Nat. Sci. Philadelphia LVII. 195 There is no evidence that chromosomes divide in different ways in the first maturation mitosis, some equationally and some reductionally. 1914Jrnl. Morphol. XXV. 622 The univalent chromosomes..conjugate first in the equator of the first maturation spindle and there separate reductionally. 1920etc. [see equational a. 3]. 1939Sansome & Philp Rec. Adv. Plant Genetics (ed. 2) vi. 183 Muller's Theory implies that the whole chromosome divides reductionally at the first division of meiosis. 1975Nature 8 May 111/1 Normally fertilisation stimulates both the completion of the reductional first meiotic division and the subsequent equational second division. |
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