English
macroalgivore
From macro- + algivore.
Proto-Indo-European *meh₂ḱ- ‘to increase’
Proto-Indo-European *mh₂ḱrós ‘lean, meager’
Proto-Hellenic *makrós
Ancient Greek μακρός ‘long’
English macro-
Today it means
noun Any organism that eats macroalgae
Language periods are conventional ranges, not dates for this word.
Etymograph / macroalgivore