Pithecoid \Pith"e*coid\, a. [Gr. ? an ape + -oid.] (Zool.) 1. Of or pertaining to the genus {Pithecia}, or subfamily {Pithecin[ae]}, which includes the saki, ouakari, and other allied South American monkeys. [1913 Webster] 2. Of or pertaining to the anthropoid apes in particular, or to the higher apes of the Old World, collectively. [1913 Webster]