adnationyoudaoicibaDictYouDict[adnation 词源字典]
"Attachment of the surface of one part to that of another part; the condition of being adnate; especially the union of one whorl of floral organs to another dissimilar whorl, as stamens to petals", Mid 19th cent.; earliest use found in Asa Gray (1810–1888), botanist. From adnate + -ion; compare -ation.[adnation etymology, adnation origin, 英语词源]