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palm·er·worm | \ ˈpä-mər-ˌwərm 
, ˈpäl-, ˈpȯ-, ˈpȯl- \
, ˈpäl-, ˈpȯ-, ˈpȯl- \Definition of palmerworm
: a caterpillar that suddenly appears in great numbers devouring herbage
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The first known use of palmerworm was in 1560
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