Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to desmid: Ulothrix
Any of various green unicellular chiefly freshwater algae of the order Desmidiales, reproducing through conjugation and sometimes forming filaments or colonies.
[From New Latin Desmidiāceae, family name, from Desmidium, type genus, from Greek desmos, bond, from dein, to bind.]
(Plants) any freshwater green alga of the mainly unicellular family Desmidioideae, typically constricted into two symmetrical halves
[C19: from New Latin Desmidium (genus name), from Greek desmos bond, from dein to bind]
any green algae of the family Desmidiaceae, each alga being composed of symmetrical half-cells bridged by a nucleus and usu. living colonially in a branching mat.
[1860–65; < New Latin Desmidium a genus < Greek desm(ós) a chain]