Rhizodiniales
plural noun
Rhi·zo·din·i·a·les
ˌrīzōˌdinēˈā(ˌ)lēz
: an order of colorless marine algae (class Dinophyceae) having the vegetative cells naked and amoeboid
Word History
Etymology
New Latin, probably from rhiz- + dini- (from Greek deinos terrible) + -ales