Pronunciation: (dûrm), [key]
a navigational device for making a nearby object conspicuous on a radarscope.
var. of dermato- before a vowel: dermoid.
var. of -dermatous, usually with nouns (melanoderm; pachyderm), or var. of -dermis (blastoderm; ectoderm; mesoderm).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.