词根词缀：exo-, ex-

【来源及含义】Greek: outer, outside, external; used as a prefix

【同源单词】exobiology, exobiotic, exocardia, exocardiac, exocardial, exocarp

词根词缀：geno-, gen-, genit-, gener-, -gen

【来源及含义】Greek > Latin: race, kind; line of descent; origin, creation; pertaining to sexual relations, reproduction, or heredity; and more recently, a gene or genes

【同源单词】abiogenesis, abiogenetic, abiogenetically, abiogenous, acrogen, acrometagenesis

词根词缀：genus, genesis-, -gen, -gene, -genesis, -genetic, -genic, -geny, -genous

【来源及含义】Latin: birth, beget; descent, origin, creation, inception, beginning, race, sort; kind, class

【同源单词】aerospace engineering, agenesis, autogenous, benign, benignant, benignantly