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nounany tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leavestype of:
Definition that contains cycad
- frond compound leaf of a fern or palm or cycad
- kaffir bread South African cycad; the farinaceous pith of the fruit used as food
- genus encephalartos genus of arborescent African cycads; sometimes classified in family Cycadaceae
- genus ceratozamia small genus of Mexican cycads; sometimes classified in family Cycadaceae
- dioon any cycad of the genus Dioon; handsome palmlike cycads with robust crowns of leaves and rugged trunks
- cycas type genus of Cycadaceae: genus of widely distributed Old World evergreen tropical trees having pinnate leaves and columnar stems covered with persistent bases of old leaves
- order cordaitales extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era
- class cycadopsida palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)
- pteridospermaphyta used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
- group pteridospermaphyta used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales