"wax," late 15c., from French cire "wax" (12c.), from Latin cera "wax, wax seal, wax writing tablet," related to Greek kēros "beeswax," which is of unknown origin, perhaps a non-IE word. As a verb, "to wax, cover with wax" (cloth, for waterproofing), late 14c., from Latin cerare, from cera. Related: Cered.
word-forming element denoting "belonging to, of the nature of," from Latin -aceus, enlarged form of adjectival suffix -ax (genitive -acis); see -acea. Especially in biology, "pertaining to X order of plants or animals."