Definition of "discoidal" [dis•coid•al]

• Having the flat, circular shape of a disc or a quoit (adjective)

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• "In the discussions of galactic origin and behavior that grew out of the earlier work on clusters and the local star system,1 it was suggested that the discoidal galactic system, originating from the combination of independent star clouds and clusters, has long been growing, by assimilating such groups, to its present relatively enormous size."
• "In the discussions of galactic origin and behavior that grew out of the earlier work on clusters and the local star system, it was suggested that the discoidal galactic system, originating from the combination of independent star clouds and clusters, has long been growing, by assimilating such groups, to its present relatively enormous size."
• "But, exactly in those respects in which the developing Man differs from the Dog, he resembles the ape, which, like man, has a spheroidal yelk-sac and a discoidal — sometimes partially lobed — placenta."