The Collaborative International Dictionary
Tetraspermous
Tetraspermous \Tet`ra*sper"mous\, a. [Tetra- + Gr. ? a seed.] (Bot.) Having four seeds.
Tetraspermous plant, a plant which produces four seeds in each flower.
Wiktionary
tetraspermous
a. (context botany English) Having four seeds.