: debris or excrement produced by insects

Examples of frass in a Sentence

Recent Examples on the Web Another telltale sign of thrips presence is the gift of frass specks glued to the leaf; frass is the term for insect excrement. Miri Talabac, Baltimore Sun, 1 Feb. 2024 In a pilot experiment, those combinations ranged from zero frass and all regolith to all frass and no regolith, covering percentages in between. Sarah Scoles, New York Times, 27 Nov. 2023 Separately, producers mix the larvae’s frass, or debris from its digestion, with a microbial inoculant extracted from the black soldier flies. Catherine Wang, Forbes, 27 Nov. 2023 Sawdust-like material called frass found on the ground around the tree or on the branches. Haadiza Ogwude, The Enquirer, 11 Aug. 2023 However, some people do develop an allergy to their frass, or poop, says Diepenbrock. Arricca Elin Sansone, Country Living, 31 July 2023 The insect larvae feed on organic materials and the resulting frass, or excrement, produces a soil amendment rich in nitrogen, phosphorous and potassium. Karl Schneider, The Indianapolis Star, 17 Apr. 2023 This is the frass secreted by the borer. oregonlive, 18 Feb. 2023 One example is the skipper caterpillar, which can shoot solid pellets of its waste, known as frass, over a distance up to 38 times its body length to keep predators off its tail. Jack Tamisiea, Scientific American, 28 Feb. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'frass.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


German, insect damage, literally, eating away, from Old High German vrāz food, from frezzan to devour — more at fret

First Known Use

1854, in the meaning defined above

Time Traveler
The first known use of frass was in 1854

Dictionary Entries Near frass

Cite this Entry

“Frass.” Dictionary, Merriam-Webster, Accessed 2 Mar. 2024.

Last Updated: - Updated example sentences
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