Hypertext Webster Gateway: "unicellular"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Unicellular \U`ni*cel"lu*lar\, a. [Uni- + cellular.]
Having, or consisting of, but a single cell; as, a
unicellular organism.
From WordNet (r) 1.7 (wn)
unicellular
adj : having or consisting of a single cell
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