† octopetalousadj. [ < octo-comb. form + -petalouscomb. form; compare later scientific Latin octopetalus (Linnaeus Species Plantarum (1753) I. 501), French octopétale (1797), octopétal (1803)] BotanyObsoleterare having eight petals.
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1736 N. Bailey et al. Dictionarium Britannicum (ed. 2) Octopetalous.
1853 A. GrayBot. Text-bk. (ed. 4) 286 A corolla of two petals is dipetalous;..of eight, octopetalous; [etc.].