regman.
/ˈrɛɡmə/, U.S. /ˈrɛɡmə/ Botany.
A form of schizocarp commonly found in plants of the family Euphorbiaceae, which splits into its constituent parts at maturity, after which these parts individually burst open (dehisce) to release the seeds.
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regma1821
sling-fruit1895
1821 S. F. Gray Nat. Arrangem. Brit. Plants II. 256 Regma bald, smooth.
1832 J. Lindley Introd. Bot. i. ii. 176 Such regmata are drupaceous.
1857 A. Henfrey Botany 142 The Carcerulus is a dry fruit formed from a many-celled ovary, the carpels of which separate when ripe into indehiscent few-celled cocci... The Regma differs from the foregoing chiefly in the cocci being individually dehiscent.
1876 Encycl. Brit. IV. 152/2 This kind of capsule is met with in the Sandbox tree..and other Euphorbiaceæ, where the cocci, containing each a single seed, burst asunder with force; and in Geraniaceæ... In the former case the fruit collectively has been called regma.
1978 A. Radcliffe-Smith in V. H. Heywood Flowering Plants of World 185/2 The type of schizocarp commonly found in the family [sc. Euphorbiaceae] is known as a regma.
1997 Kew Bull. 52 178 The fruit is a typical trilocular dehiscent regma.
This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).
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n.1821