Definitions
1.AdjectiveHaving male (staminate), female (pistillate), and bisexual flowers on the same plant (also known as "polygamous"), like Fraxinus excelsior
2.AdjectiveBelonging to the former Linnaean order Trioecia, consisting of plants of this type.
3.AdjectiveHaving three sexes: male, female and hermaphrodite, as some nematodes.