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1.
Someone who, though not a vegetarian or vegan, moderates their diet based on ethical or environmental principles.

From Latin tempero "be moderate, control oneself, to keep from, refrain from" + voro "to eat greedily, swallow up, consume, gorge oneself."
"I don't eat factory-farmed meats and dairy or commercially harvested fish on the brink of extinction, but don't have a problem eating farmed clams, wild elk, or the eggs from my neighbor's back yard chickens. Guess that makes me a temperovore."
by Eoghan01 April 05, 2010