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：melano-, melan-, mela-, melen-

【来源及含义】Greek: the color black; dark

【相关词根词缀】Other related "dark; shadow, shade; black" units: lygo-; nigri-; nocti-; nycti-; scoto-; skio-; umbra-.

【同源单词】hepatomelanosis, leucomelanous, melancholia, melancholiac, melancholic, melancholy