Sphacelariales

plural noun

Sphac·​e·​lar·​i·​a·​les

: an order of small or medium-sized much branched parenchymatous brown algae (class Isogeneratae) that are found chiefly in the lower part of the intertidal zone and grow from apical cells on the branches

Word History

Etymology

New Latin, from Sphacelaria + -ales

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