- insect excrement.
Origin of frass
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for frass
Generally underneath the tree will be found the frass, or ejectamenta, of the caterpillar.The Butterfly Book
William Jacob Holland
- excrement or other refuse left by insects and insect larvae
C19: from German, from fressen to devour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for frass
insect excrement, 1854, from German frasz, from root of fressen "to devour, to eat as a beast does" (see fret (v.)).
Online Etymology Dictionary, © 2010 Douglas Harper