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

词根词缀：ultim-

【来源及含义】Latin: end, last, final

【同源单词】A primo ad ultimum, Ad finem ultimum, antepenult, antepenultimate, penult, penultimate

词根词缀：ultra-, ult-

【来源及含义】Latin: beyond, on the other side; excessive, to an extreme degree

【相关词根词缀】 Related "above, over, beyond the normal, excessive" word units: epi-; hyper-; super-, supra-. Inter-related cross references, directly or indirectly, involving word units meaning "more, plentiful, fullness, excessive, over flowing": copi-; exuber-; hyper-; multi-; opulen-; ple-; pleio-; plethor-; poly-; super-; total-; undu-.

【同源单词】A primo ad ultimum, Ad finem ultimum, antepenultimate, bioultrasonics, cryoultramicrotomy, exultingly