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Any of several caterpillars that feed on the leaves of fruit trees, such as the small green caterpillar of the North American moth Dichomeris ligulella.
[From palmer (the caterpillars perhaps being so called because they were thought to move about constantly like palmers on pilgrimage).]
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.
the larva of a moth, Dichomeris ligulella, of the eastern U.S., that feeds on the leaves of fruit trees.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.