[ bag-wurm ]
/ ˈbægˌwɜrm /


any moth of the family Psychidae in its caterpillar phase, in which it wraps itself in a bag of silk, leaves, etc.

Origin of bagworm

An Americanism dating back to 1860–65; bag + worm Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bagworm

  • My trees are troubled with tent-caterpillar, bagworm and roundhead borer.

    The Apple|Various

British Dictionary definitions for bagworm


/ (ˈbæɡˌwɜːm) /


the larva of moths of the family Psychidae, which forms a protective case of silk covered with grass, leaves, etc
bagworm moth any moth of the family Psychidae
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