plural of introgression

(genetics) The movement of a gene from one species to another.

present participle of introgress

able to be introduced

Of, pertaining to, or serving as an introduction

(obsolete) simple past tense and past participle of introduct / (nonstandard, proscribed) simple past tense and past participle of introduce (by confusion with "introduction")

(obsolete) To instruct / (obsolete) To introduce

A company which arranges dates and marriages between men and women, often from different countries.

By way of introduction.

Without introduction.