acanthaceae
- n widely distributed herbs and shrubs and trees; sometimes placed in the order Scrophulariales
acanthion
- n the craniometric point at the anterior extremity of the intermaxillary suture
acanthisittidae
- n alternative names for the family comprising the New Zealand wrens
acanthocephala
- n phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms