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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.

Disk-shaped; discoid.

Discoidal by derivation; -- applied especially to the placenta of man and apes, because it is supposed to have been derived from a diffused placenta.

In ascomycetous fungi, the spherical, discoid, or cup-shaped body within which the asci are collected, and which constitutes the mature fructification. The different forms are known in mycology under distinct names. Called also spore fruit.

Bearing the stamens on a discoid outgrowth of the receptacle; - - said of a subclass of plants. Cf. Calycifloral.

Discoid.

One of a species of coccoliths, having an oval discoidal body, with a thick strongly refracting rim, and a thinner central portion. One of them measures about

Disklike; discoid.

air-breathing mollusk belonging to Planorbis and other allied genera, having shells of a discoidal form.

ivot of a capstan. Flying saucer, a type of Unidentified Flying Object, having a biconvex discoid shape; such objects are occasionally reported to have been sighted, but no example of one has been reliably shown to exist. They are believed by ufologists to originate in outer space, but they are generally presumed to be…