Definition of "spanworm" []

• See measuring worm. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Other bugs to look out for this spring include the elm bark beetle and the elm spanworm."
• "As an adult, the snowbush spanworm is a white-tipped black moth."
• "This yellow and black snowbush spanworm is dining heartily."