Meaning of UNIVALENT in English

UNIVALENT

I. adjective Date: 1868 monovalent 1, being a chromosomal ~, II. noun Date: 1912 a chromosome that lacks a synaptic mate

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.