Cycadales
plural nounCy·ca·da·les
Definition of Cycadales
: an order of gymnospermous plants abundant in the Mesozoic but now reduced to a few localized and widely scattered tropical forms that have an unbranched trunk which is tall and arborescent or squat and tuberous with a large pith and starchy cortex and that bears a terminal crown of long pinnate leaves together with one or more very large cones — see cycadaceae
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