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discoid a. 鐵餅狀的,平圓形的 鐵餅狀的,平圓形的 discoid adj 1: having a flat circular shape [synonym: {discoid}, {discoidal}, {disklike}, {disclike}, {disk-shaped}, {disc-shaped}] Discoid \Dis"coid\, n.
Anything having the form of a discus or disk; particularly, a discoid shell. [1913 Webster] Discoid \Dis"coid\, a. [Gr. ? quoit-shaped, ? a round plate, quoit e'i^dos 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. [1913 Webster] {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. [1913 Webster]
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