Protococcus
noun
Pro·to·coc·cus
Definition of Protococcus
: a genus of unicellular globose chiefly terrestrial green algae (family Protococcaceae) that in former classifications included most such aerial algae but is now usually restricted to forms with a single large peripheral cloroplast that divide in two planes to form thin filmy colonies (as on damp rocks or the bark of trees) — compare chlorococcum
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