| ACACIAS | • acacias n. Plural of acacia. • ACACIA n. a genus of thorny leguminous trees and shrubs, found esp. in arid regions of Australia and tropical Africa. |
| ACADEME | • academe n. (Historical) The name of the garden in Athens where the academics met. • academe n. (Poetic) An academy; a place of learning. • academe n. (Poetic) The scholarly life, environment, or community. |
| ACADEMY | • academy n. (Classical studies, usually capitalized) The garden where Plato taught. • academy n. (Classical studies, usually capitalized) Plato’s philosophical system based on skepticism; Plato’s followers. • academy n. An institution for the study of higher learning; a college or a university; typically a private school. |
| ACAJOUS | • acajous n. Plural of acajou. • ACAJOU n. (Tupi) the cashew tree; also, its fruit. |
| ACALEPH | • acaleph n. (Dated) A member of the former Acalephae group, now a part of the Cnidaria phylum. • ACALEPH n. (Greek) any cnidarian (jellyfish), also ACALEPHAN, ACALEPHE. |
| ACANTHA | • acantha n. (Botany) A prickle. • acantha n. (Zoology) A spine or prickly fin. • acantha n. (Anatomy) A spinous process of a vertebra. |
| ACANTHI | • acanthi n. Plural of acanthus. • ACANTHUS n. a prickly plant with toothed leaves, also ACANTH, ACANTHA. |
| ACANTHS | • acanths n. Plural of acanth. • ACANTH n. a prickly plant with toothed leaves, also ACANTHUS, ACANTHA. |
| ACAPNIA | • acapnia n. The state in which the level of carbon dioxide in the blood and tissue is significantly lower than normal. • ACAPNIA n. a lack of carbon dioxide. |
| ACARIAN | • acarian n. Any mite or tick of the subclass Acari. • ACARIAN adj. pertaining to mites, small arachnids. |
| ACARIDS | • acarids n. Plural of acarid. • ACARID n. a member of the mite or tick family, also ACARIDAN, ACARINE, ACARUS. |
| ACARINE | • acarine adj. (Medicine) Of or caused by acari or mites. • acarine n. (Zoology) Synonym of acarid. • ACARINE n. a tick-like animal, also ACARID, ACARIDAN. |
| ACAROID | • acaroid adj. (Biology, zoology) Shaped like or resembling a mite. • ACAROID adj. resembling an acarid, a mite. |
| ACATERS | • acaters n. Plural of acater. • ACATER n. (obsolete) an officer who buys provisions; a chandler, also ACATOUR. |
| ACATOUR | • acatour n. (Historical or obsolete) The member of a large household responsible for buying provisions; provisioner. • ACATOUR n. (obsolete) an officer who buys provisions; a chandler, also ACATER. |
| ACAUDAL | • acaudal adj. Acaudate. • ACAUDAL adj. tailless, also ACAUDATE. |