Dictyopyge (diktiopije)

[NL., Leaf of Dicty opter is Brongniarti, and δικτυον, a net, + πυγή, buttocks.] A genus of Tria ic ganoid fishes, remains of which occur in the coal-fields of Virginia: so called from the reticulated ap pearance of the large anal fin. Lyell, 1847. Dictyotaceæ (dikti-ō-tā sē-ē), n. pl. [NL., tive characters they are intermediate between the Flori deæ on the one hand and the Fucaceæ and Phœosporeæ on the other. IMG:content-2591.png:[blocks in formation] IMG:content-2592.png:[blocks in formation] IMG:content-2593.png:[merged small][ocr errors][merged small][ocr errors] Skull of Dicynodon lacerticeps, left side. IMG:content-2594.png:[blocks in formation] of διδάσκειν, teach (for *δι-δακ-σκειν?), L. do- cere, teach (see docile ), cf. disc -ere, learn (see IMG:content-2595.png:[ocr errors] disciple ); cf. Gr. aor. inf. δαῆναι , learn, redupl. 2d aor. δέδαε , he taught, perf. δεδάηκα , also δέδαα , I know; cf. Zend √ da , know.] know.] I. a. 1. Fitted or intended for instruction; containing doc- trines, precepts, principles, or rules; instruc- tive; expository; edifying: as, a didactic trea- tise; didactic poetry. Plato himself, in two of his Dialogues, had used the Cart hag in i an voyages as materials for didactic fiction. 2. Pertaining to instruction; of an edifying quality, character, or manner; used in or given to exposition: as, a didactic style; didactic methods; a didactic lecturer. Deep obligations lie upon you, not only to be blamele , but to be didactic in your lives. IMG:content-2596.png:[blocks in formation] diddle1 (did'l), v. i.; pret. and pp. diddled , ppr. diddling. [A var. of didder , the freq. suffixes of dic -er and -le being interchangeable. Cf. daddle , and dadder mentioned under didder .] To tod- dle, as a child in walking; move rapidly up and down, or backward and forward; jog; shake. [Prov. Eng. and Scotch.] And when his forward strength began to bloom, To see him diddle up and down the room! O, who would think so sweet a babe as this Should e'er be slain by a false-hearted ki ? Bp. Andrews , Ans. to Cardinal Perron, p. 50. didactic i an (did-ak-tish'an), n. [ didactic + -ian.] One who teaches; a writer who aims to convey instruction; one who writes didac- tically. His e ays are illuminated by his poetic imagination, didactic i an ever could be. Stedman , Vict. Poets, p. 100. didacticism (di-dak'ti-sizm), n. [ didactic + -ism.] The practice of conveying or of aiming to convey instruction; the tendency to be di- dactic in matter or style. didact i city (did-ak-tis'i-ti), n. -ity .] The quality of being didactic; didact i- cism. Hare . [Rare.] didactics (di-dak'tiks), n. [Pl. of didactic : see -ics.] The art or science of teaching; ped a- did active (di-dak'tiv), a. [ didact -ic + -ive.] Didactic. [Rare.] He is under the restraint of a formal or did active hy Lamb , Old and New Schoolmaster. I should absolutely have diddled Hounslow if it had not been for her confounded pretty face flitting about my stupid brain. Disraeli, Young Duke, ii. 3. diddler (did'ler), n. [ diddle2 + -er1.] A cheat; a swindler. [Slang.] didet. A Middle English form of did . See dol. didecahedral (di-dek-a-hedral), a . [ di - 2 + decahedral .] In In crystal ., having the form of a decahedral or ten-sided prism with pentahe- dral or five-sided bases. didelph (di'delf), n. A member of the Didel- phi a ; a marsupial. didactyl, didactyle (di-dak'til), a. and n. διδάκτυλος, fingers long or broad, lit. having two fingers, dactyl .] I. a. Having only two digits, as fingers or toes; two-fingered or two-toed: in the arthropods, applied to limbs which ter- minate in a forceps or chela. Also bidactyl . II. n. An animal having two toes only on each foot, as the Bradypus didactyl us or two- toed sloth. Didelphyidæ Didelphyidæ, Didelphide (di-del-fi'i-dē, didel'fi-dē), n. pl. [NL., pouch son in others rudimentary or wanting. The dental formula is: 5 incisors in each up per, 4 in each lower half-jaw; 1 canine, 3 premolars, and 4 molars in each half-jaw. The vertebral formula is: cervical 7, dorsal 13, lumbar 6, sacral 2, caudal 19 or more. The family is confined to America, where it alone represents the division of marsupial mammals. The leading genera are Didelphys, including most of the species, and Chironectes, the water-opo ums. See Didelphys, opo um. Didelphys (di-del'fis), n. [NL.,