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A larva of any of various chalcid wasps of the family Eurytomidae, especially of Tetramesa tritici, that infests grains, causing swelling and subsequent breakage near the first joint of the stem.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Animals) US the larva of chalcid flies of the genus Harmolita, esp H. tritici, which form galls on the stems of cereal plants
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a chalcid larva that feeds within the stems of grasses, often forming a gall at a joint. Also called strawworm.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||jointworm - larva of chalcid flies injurious to the straw of wheat and other grains|
Chalcidae, Chalcididae, family Chalcidae, family Chalcididae - an arthropod family including: chalcidflies
larva - the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose
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