Didactyl, dī-dak′til, adj. having only two digits—also Didac′tylous.—n. Didac′tyl, an animal with two toes only on each foot.

Didapper, did′ap-ėr, n. a water-bird that is constantly dipping or diving under water—also called the Dabchick. [A compound of dive and dapper (which is a variant of dipper). See Dip and Dive.]

Didascalic, did-as-kal′ik, adj. didactic.

Didder, did′ėr, v.i. (prov.) to shake.

Diddle, did′l, v.t. to cajole, swindle.—n. Didd′ler.

Didecahedral, dī-dek-a-hē′dral, adj. (crystal.), having five planes on each extremity.

Didelphia, dī-del′fi-a, n.pl. the marsupialia, or marsupial implacental mammals, one of the three sub-classes of Mammalia.—adjs. Didel′phian, Didel′phic. [Gr. di-, double, delphys, womb.]

Dido, dī′dō, n. (slang) an antic caper.—Cut up didoes, to behave in an extravagant way.

Didodecahedral, dī-do-dek-a-hē′dral, adj. of a six-sided-prism, truncated on the lateral edges, and acuminated on the extremities with six planes.

Didrachma, dī-drak′ma, n. a double drachma.