Cycloidian :: Cycloidian (a. & n.) Same as 2d and 3d Cycloid.
Desmidian :: Desmidian (n.) A microscopic plant of the family Desmidiae, a group of unicellular algae in which the species have a greenish color, and the cells generally appear as if they consisted of two coalescing halves..
Diana :: Diana (n.) The daughter of Jupiter and Latona; a virgin goddess who presided over hunting, chastity, and marriage; -- identified with the Greek goddess Artemis..
Diandria :: Diandria (n. pl.) A Linnaean class of plants having two stamens.