The act of making shrill sounds or musical notes by rubbing together certain hard parts, as is done by the males of many insects, especially by Orthoptera, such as crickets, grasshoppers, and locusts
() Back-formation from stridulation. (From earlier term stridulous; from Latin strīdulus (“giving a shrill sound, creaking”), from strīdō (“utter a shrill or harsh sound; creak, shriek, grate, hiss”))