To produce a shrill grating, chirping, or hissing sound by rubbing body parts together, as certain insects do.
To produce by rubbing body parts together: "The crickets stridulated their everlasting monotonous meaningful note” ( John Updike).
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.