DISCOID

Dis″coid (?), a. [[Gr. � quoit-shaped, � a round plate, quoit + � form, shape: cf. F. discoïde. 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.