co·ad·u·nate  (kō-āj'ə-nĭt, -nāt')  adj. Closely joined; grown together; united. [Late Latin coadūnātus, past participle of coadūnāre, to combine : Latin co-, co- + Latin adūnāre, to unite (ad-, ad- + ūnus, one; see oi-no- in Indo-European roots).] co·ad'u·na'tion (-nā'shən) n., co·ad'u·na'tive adj. |