adj. Of, pertaining to, or shaped like a disc / disk
the GNU version of the Collaborative International Dictionary of English
adj. Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus.
n. Anything having the form of a discus or disk; particularly, a discoid shell.
The Century Dictionary and Cyclopedia
Having the form of a disk; pertaining to a disk.
Also discoidal.
n. Something in the form of a disk or quoit.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. having a flat circular shape
Word Usage
""He had a form of skin lupus, called discoid lupus, which affects about 40 percent of the patients with lupus," Lahita said, adding that this condition can lead to depigmentation of the skin, among other things."