• (a.) Bearing aments; having flowers arranged in aments; as, amentaceous plants. • (a.) Resembling, or consisting of, an ament or aments; as, the chestnut has an amentaceous inflorescence. Found on http://thinkexist.com/dictionary/meaning/amentaceous/
Am`en·ta'ceous adjective [ Late Latin amentaceus .] (Botany) (a) Resembling, or consisting of, an ament or aments; as, the chestnut has an amentaceous inflorescence. (b) Bearing aments; having flowers arranged in aments; as, amentaceous plants. Found on http://www.encyclo.co.uk/webster/A/69