| acanthocephala | (n) phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms, Syn. phylum Acanthocephala |
| acanthocephalan | (n) any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines, Syn. spiny-headed worm |
| acanthocereus | (n) mostly trailing cacti having nocturnal white flowers; tropical America and Caribbean region, Syn. genus Acanthocereus |
| acanthocybium | (n) wahoos, Syn. genus Acanthocybium |
| acanthocyte | (n) an abnormal red blood cell that has thorny projections of protoplasm |
| acanthocytosis | (n) the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) |
| acanthoid | (adj) shaped like a spine or thorn, Syn. spinous, acanthous |
| acantholysis | (n) a breakdown of a cell layer in the epidermis (as in pemphigus) |
| acanthoma | (n) a neoplasm originating in the epidermis, Syn. skin tumor |
| acanthophis | (n) Australian elapid snakes, Syn. genus Acanthophis |
| Acanthocarpous | a. [ Gr. &unr_; thorn + &unr_; fruit. ] (Bot.) Having the fruit covered with spines. [ 1913 Webster ] |
| Acanthocephala | ‖n. pl. [ NL., from Gr. &unr_; a spine, thorn + &unr_; head. ] (Zool.) A group of intestinal worms, having the proboscis armed with recurved spines. [ 1913 Webster ] |
| Acanthocephalous | a. (Zool.) Having a spiny head, as one of the Acanthocephala. [ 1913 Webster ] |
| Acanthophis | n. |
| Acanthophorous | a. [ Gr. &unr_;, fr. &unr_; spine + |
| Acanthopodious | a. [ Gr. &unr_; thorn + &unr_;, &unr_;, foot. ] (Bot.) Having spinous petioles. [ 1913 Webster ] |
| Acanthopteri | ‖n. pl. [ NL., from Gr. &unr_; thorn + &unr_; wing, fin. ] (Zool.) A group of teleostean fishes having spiny fins. See Acanthopterygii. [ 1913 Webster ] |
| Acanthopterous | a. [ Gr. &unr_; spine + &unr_; wing. ] |
| Acanthopterygian | a. (Zool.) Belonging to the order of fishes having spinose fins, as the perch. -- |
| Acanthopterygii | ‖n. pl. [ NL., from Gr. &unr_; thorn + &unr_; fin, dim. fr. &unr_; wing. ] (Zool.) An order of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch. [ 1913 Webster ] |