An animal that feeds on grass, such as a cow, sheep, or horse; a person who eats small amounts of food frequently.
From 'graze' plus '-er' (agent suffix). The term evolved to describe both animals that eat grass and people who snack continuously.
Ecologists divide herbivores into grazers (who eat grass) and browsers (who eat bushes and trees), and entire ecosystems evolved with grazer migrations—think African wildebeest or American buffalo herds!
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