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When weighing the produce, left-overs, frass, webbing, pest carcasses and rodent droppings are also weighed.— 3. Post - harvest losses
We also clean out the bags of chewed up stems and caterpillar poo, which is called "frass."— TravelPod.com TravelStream™ — Recent Entries at TravelPod.com
Over here, we are celebrating what chewed leaves, in this particular case, chewed tomato leaves, turn into: frass, that is, insect shit.— SNAIL'S TALES
They then use their silk (all caterpillars have silk-producing glands in their mouths) to glue tiny pieces of their excrement (frass) to the end of the midvein, elongating it by as much as ½ "(it helps to have a hand lens or magnifying loupe to see this).— Museum Blogs
Frass has been looked up 397 times, favorited twice, listed 15 times, and commented on 14 times.

American Heritage Dictionary (1)
Century Dictionary (1)
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