geminate

New research suggests this type of algae — called Didymosphenia geminate, or didymo — is a native species, but the environmental conditions that trigger its visible growth in rivers were previously rare or absent.

Mouth-spots two, or one, with a distinct construction; flagella symmetrically arranged; nucleus bilobed or geminate.

Rottboellia.Sessile spikelets geminate in all except the uppermost joints 26.

The cells upon which the ovicells are placed are always geminate, that is to say, have a smaller cell growing out from one side.

V. double, redouble, duplicate, reduplicate; geminate; repeat &c.