kəˌlāsēˈā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Colacium (from Greek kolak-, kolax parasite, flatterer + New Latin -ium ) + -ales; perhaps akin to Greek kēlein to beguile — more at calumny
: 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