| desmid | <botany> Chlorophyte algae that are usually freshwater living and unicellular. Their cell wall often has elaborate ornamented shape. (18 Nov 1997) |
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| desmidian | <botany> A microscopic plant of the family Desmidiae, a group of unicellular algae in which the species have a greenish colour, and the cells generally appear as if they consisted of two coalescing halves. Origin: Gr. Chain + form. Source: Websters Dictionary (01 Mar 1998) |