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comparative more disciform, superlative most disciform
(botany) Having a flat, rounded shape. quotations examples
The sporophyte foot is also characteristic: it is very broad and more or less lenticular or disciform, as broad or broader than the calyptra stalk […] , and is sessile on the calyptra base […]
1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, page 5