columbarium (n.)youdaoicibaDictYouDict[columbarium 词源字典]
"subterranean sepulchre in ancient Roman places with niches for urns holding remains," neuter of Latin columbarius, "dove-cote" (so called from resemblance), literally "pertaining to doves;" from columba "dove." Literal sense of "dove-cote" is attested in English from 1881.[columbarium etymology, columbarium origin, 英语词源]