n. Any of about 5000 species of mostly unicellular freshwater green algae belonging to the order Desmidiales.
the GNU version of the Collaborative International Dictionary of English
n. A microscopic plant of the family Desmidiæ, a group of unicellular algæ in which the species have a greenish color, and the cells generally appear as if they consisted of two coalescing halves.
The Century Dictionary and Cyclopedia
n. A plant of the order Desmidiaceæ.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. freshwater green algae
Word Usage
"She returned to New Zealand in the fifties and wrote the three definitive books on desmid taxonomy."