Definition of zoochlorella in US English:

zoochlorella

noun

Biology
  • Any of various unicellular green algae (formerly grouped in the genus Zoochlorella) which are symbionts within the cells of certain freshwater and marine invertebrates and protists. Chiefly in plural.

Origin

Late 19th century; earliest use found in Popular Science Monthly. From scientific Latin Zoochlorella, former genus name from zoo- + chlor- + classical Latin -ella.