Dertrothe´ca, a. Covering of end of bill.
Der´trum, n. End of maxilla, in any way distinguished. (21.)
Desmognath´ous, a. Having the palate bones united.
Des´moid, a. Ligamentous.
Desquama´tion, n. Peeling off.
Dex´trad, a. Toward the right side.
Dex´tral, a. Of or on the right side.
Di- (in composition). Twice; double.
Diagno´sis, n. Distinctive knowledge. Also characterization, or a brief, precise, and exclusively pertinent definition. Diagnosis is nearly synonymous in this sense with definition; both differ from description in omitting non-essential particulars; but definition may include points equally applicable to some other object.
Diagnos´tic, a. Distinctively and exclusively characteristic. Feathers are diagnostic of birds.