trioecious

Biology, Botany, Natural sciences Having male (staminate), female (pistillate), and bisexual flowers on the same plant (also known as "polygamous"), like Fraxinus excelsior

Biology, Botany, Natural sciences Obsolete Belonging to the former Linnaean order Trioecia, consisting of plants of this type.

Biology, Natural sciences, Zoology Having three sexes: male, female and hermaphrodite, as some nematodes.