endogamy

• n. 同部族婚姻；同组结婚；同族结婚；[植] 同系配合，[生物] 同系交配

endo-, 内，里面。-gamy, 结婚，词源同exogamy,bigamy.

endogamy (n.)

"marriage within the tribe or group," 1865, from endo- on model of polygamy. Related: Endogamous (1865). Opposed to exogamy. Apparently both were coined by Scottish anthropologist John Ferguson McLennan (1827-1881) in "Primitive Marriage."

To this law, the converse of caste, forbidding marriage within the tribe, Mr. M'Lennan has given the name of exogamy: while, instead of caste, since that word involves notions unconnected with marriage, he has used the correlative word -- endogamy. [review in "The Lancet," March 25, 1865]