Co·la·ci·a·les | \ kəˌlāsēˈā(ˌ)lēz \
Definition of Colaciales
: an order of algae (class Euglenophyceae) comprising those forms that have immobile cells with an encapsulating wall and that develop amorphous or dendroid colonies with sometimes temporary naked flagellate stages, the members of some of its genera (as Colacium) occurring on rotifers, copepods, and other minute aquatic animals
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