The Collaborative International Dictionary
Dimerous
Dimerous \Dim"er*ous\, a. [Gr. di- = di`s- twice + ? part.] Composed of, or having, two parts of each kind.
Note: A dimerous flower has two sepals, two petals, two stamens, and two pistils.
Wiktionary
dimerous
a. (context botany English) in two parts: in a flower each whorl (of flower parts) has two flower parts.