noun Etymology: intro- + -gression (as in regression) Date: 1938 the entry or introduction of a gene from one gene complex into another (as by hybridization), introgressant adjective or noun introgressive adjective
INTROGRESSION
Meaning of INTROGRESSION in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012