or meas·ur·ing worm
the larva of any geometrid moth, which progresses by bringing the rear end of the body forward and then advancing the front end.
Origin of measuringworm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the larva of a geometrid moth: it has legs on its front and rear segments only and moves in a series of loopsAlso called: looper, inchworm
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