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The Collaborative International Dictionary
Tristigmatic

Tristigmatic \Tri`stig*mat"ic\, Tristigmatose \Tri*stig"ma*tose`\, a. [Pref. tri- + stigma.] (Bot.) Having, or consisting of, three stigmas.
--Gray.

Wiktionary
tristigmatic

a. (context botany English) Having, or consisting of, three stigmas.