adnate
adjective
ad·nate ˈad-ˌnāt 
: grown to a usually unlike part especially along a margin
a calyx adnate to the ovary
adnation
ad-ˈnā-shən
noun 
Word History
Etymology
borrowed from Latin adnātus, agnātus, past participle of adnāscī, agnāscī "to be born in addition (to), grow later, grow as an addition (to)" — more at agnate entry 1
First Known Use
1648, in the meaning defined above