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  1. belonging or pertaining to the family Geometridae, comprising slender-bodied, broad-winged moths, the larvae of which are called measuring worms.
  1. a geometrid moth.

Origin of geometrid

1860–65; < New Latin Geometridae, equivalent to Geometr(a) a genus name (see geometer; so called because the larva seems to measure the ground with its looping motion) + -idae -id2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for geometrid


  1. any moth of the family Geometridae, the larvae of which are called measuring worms, inchworms, or loopers
  1. of, relating to, or belonging to the Geometridae

Word Origin

C19: from New Latin Geōmetridae, from Latin, from Greek geometrēs: land measurer, from the looping gait of the larvae
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