achiasmaticadj.
/ˌeɪkʌɪəzˈmatɪk/, U.S. /ˌeɪkaɪəzˈmædɪk/ Cell Biology.
Occurring without the formation of a chiasma (chiasma n. 2); having no chiasma.
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achiasmatic1962
achiasmate1965
1962 Chromosoma 13 526 The occurrence of achiasmatic meiosis..in the female prompted detailed study of the behaviour of their meiotic chromosomes.
1989 Jrnl. Heredity 80 10/1 Most species show sex differences in autosomal recombination, including many examples of achiasmatic males as well as achiasmatic females.
2006 Jrnl Cell Biol. 173 486/1 In mouse oocytes that are deficient for MlhI, the resulting achiasmatic mutant germ cells cannot establish a proper meiotic spindle.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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adj.1962