Polysiphonia

noun

Poly·​si·​pho·​nia

: a large genus of red algae (family Rhodomelaceae) having usually a filamentous much-branched thallus variable in shape and size but in cross section showing a single axial cell surrounded by a sheath of tubular cells at least in the axis and main branches

Word History

Etymology

New Latin, from poly- + siphon- + -ia

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