[trig-uh-muh s]
  1. of or relating to trigamy or a trigamist.
  2. Botany. having staminate, pistillate, and hermaphrodite flowers in the same flower head.

Origin of trigamous

First recorded in 1835–45, trigamous is from the Greek word trígamos thrice married. See tri-, -gamous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018