{ } a. [ Pref. di- + theca. ] (Bot.) Having two thecæ, cells, or compartments. [ 1913 Webster ]

n. [ Pref. di- + theism: cf. F. dithéisme. ] The doctrine of those who maintain the existence of two gods or of two original principles (as in Manicheism), one good and one evil; dualism. [ 1913 Webster ]

n. One who holds the doctrine of ditheism; a dualist. Cudworth.

{ } a. Pertaining to ditheism; dualistic. [ 1913 Webster ]

a. [ Pref. di- + -thionic. ] (Chem.) Containing two equivalents of sulphur; as, dithionic acid. [ 1913 Webster ]

Dithionic acid (Chem.), an unstable substance, H2S2O6, known only in its solutions, and in certain well-defined salts. [ 1913 Webster ]

n. [ L. dithyrambus, Gr. &unr_; a kind of lyric poetry in honor of Bacchus; also, a name of Bacchus; of unknown origin: cf. F. dithyrambe. ] A kind of lyric poetry in honor of Bacchus, usually sung by a band of revelers to a flute accompaniment; hence, in general, a poem written in a wild irregular strain. Bentley. [ 1913 Webster ]

a. [ L. dithyrambicus, Gr. &unr_;: cf. F. dithyrambique. ] Pertaining to, or resembling, a dithyramb; wild and boisterous. “Dithyrambic sallies.” Longfellow. -- n. A dithyrambic poem; a dithyramb. [ 1913 Webster ]

n. [ L. ] See Dithyramb. [ 1913 Webster ]