prasinophyte
/prəˈzɪnə(ʊ)fʌɪt/noun
A green alga of the class Prasinophyceae, comprising mainly free-living, unicellular, flagellate forms with scales on the cell body and flagellae.
Origin
1960s; earliest use found in Frank Eric Round (b. 1927). From ancient Greek πράσινος leek-green + -phyte, after French Prasinophycinées or scientific Latin Prasinophyceae, class name.