Discoid \Dis"coid\, a. [Gr. ? quoit-shaped, ? a round plate,
quoit + ? form, shape: cf. F. disco["i]de. See Disk.]
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.
Discoid flower (Bot.), a compound flower, consisting of
tubular florets only, as a tansy, lacking the rays which
are seen in the daisy and sunflower.
Source: Webster's Revised Unabridged Dictionary (1913)
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