Rhizodiniales

plural noun
Rhi·zo·din·i·a·les | \ˌrīzōˌdinēˈā(ˌ)lēz\

Definition of Rhizodiniales 

: an order of colorless marine algae (class Dinophyceae) having the vegetative cells naked and amoeboid

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History and Etymology for Rhizodiniales

New Latin, probably from rhiz- + dini- (from Greek deinos terrible) + -ales

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