The definition of frass is the waste left as an animal's bowel movement.(noun)
An example of frass is what a bug excretes after eating a leaf.
See frass in Webster's New World College Dictionary
See frass in American Heritage Dictionary 4
Origin: German, feed, result of eating, insect damage
Origin: , from Middle High German vrâz
Origin: , from Old High German frāz
Origin: , from frezzan, to eat; see ed- in Indo-European roots.
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