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noun, plural reg·ma·ta [reg-muh-tuh] /ˈrɛg mə tə/. Botany.
  1. a dry fruit consisting of three or more carpels that separate from the axis at maturity.
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Origin of regma

1830–40; < New Latin < Greek rhêgma fracture, break, equivalent to rhēg(nýnai) to break, shatter + -ma noun suffix of result
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018