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Discoid   Listen
adjective
Discoid  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.
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.






Collaborative International Dictionary of English 0.48








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"Discoid" Quotes from Famous Books



... from which the distinctive sectional appellation is derived. This band or stripe varies in width and proportionate length and position in different species; it is slightly elevated, and marked with larger, or small circular discoid, or acuminated eminences. This subdivision is further distinguished by the situation of the ovicells, which are not terminal, but occur at irregular intervals on cells in the course of the series. They are of the same galeate form as in many others of the ...
— Narrative Of The Voyage Of H.M.S. Rattlesnake, Commanded By The Late Captain Owen Stanley, R.N., F.R.S. Etc. During The Years 1846-1850. Including Discoveries And Surveys In New Guinea, The Louisiade • John MacGillivray

... great bulk of the formative yelk lie at the upper or animal pole (hence these ova are also called "telolecithal"). In these cases the cleavage of the ovum begins at the upper pole, and leads to the formation of a dorsal discoid embryo. This is the case with all meroblastic vertebrates, most fishes, the reptiles and birds, and the oviparous ...
— The Evolution of Man, V.1. • Ernst Haeckel



Words linked to "Discoid" :   discoid lupus erythematosus, disclike, disk-shaped, discoidal, disklike, round, circular, disc-shaped



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