DERIVEMENT
De*rive"ment, n.
Defn: That which is derived; deduction; inference. [Obs.]
I offer these derivements from these subjects. W. Montagu.
DERIVER
De*riv"er, n.
Defn: One who derives.
DERK
Derk, a.
Defn: Dark. [Obs.] Chaucer.
-DERM -derm. Etym: [See Derm, n.]
Defn: A suffix or terminal formative, much used in anatomical terms, and signifying skin, integument, covering; as, blastoderm, ectoderm, etc.
DERM
Derm, n. Etym: [Gr. derme. See Tear, v. t.]
1. The integument of animal; the skin.