noun
historical BotanyIn the Linnaean artificial system: the sixteenth class of plants, comprising those with hermaphrodite flowers having the stamens united by their filaments below to form one set or tube.
Origin
Mid 18th century; earliest use found in Chambers's Cyclopaedia. From scientific Latin Monadelphia, former class name (LinnaeusSystema Naturae) from mono- + -adelphia.
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