同源

tóng yuán cí

同源词

cognate words

tóng zōng tóng xuè tǒng huò tóng yuán

同宗，同血统或同源

of the same lineage or origin

tóng yuán qì guān

同源器官

homologous organ

tóng yuán rǎn sè tǐ

同源染色体

homologous chromosome