| 释义 |
inviable, a. Biol.|ɪnˈvaɪəb(ə)l|
[f. in-3 + viable a.1]
Unable to survive; unable to germinate, grow or develop; unable to perform its proper biological role.
1918Genetics III. 476 The disadvantage of so many individuals being rendered sterile or inviable. 1946Nature 12 Oct. 520/2 Among 986 seeds collected in 1941 from chimeral plants there were found six triploid ones, three of which proved inviable. 1948Mind LVII. 297 He found that within one ‘species’ of frog..ranging from lat. 45° N. to 27° N. in the United States, representatives of the northern and southern ends of the range gave inviable hybrids, though parents not too far apart geographically gave normal development. 1955New Biol. XIX. 21 More usually an unbalanced and inviable nucleus is formed [from an irregular mitosis] in which some chromosomes are represented twice, others once or not at all. 1956Nature 31 Mar. 626/2 Damage arising from inviable recombinations of broken chromosome ends. 1962Lancet 29 Dec. 1384/2 Since the O-sperm, if functional, leads to the Turner zygote which is in great deficit in the general population, it seems likely that O-sperm are inviable and that the Turners are due to a phenomenon other than fertilisation by O-sperm.
So inviaˈbility, the state or condition of being inviable.
1918Genetics III. 614/2 (Index), Inviability. 1929Encycl. Brit. XI. 495/1 The inviability of most gametic and zygotic combinations. 1972[see inversion 2 h]. |