strid·u·late (strĭj'ə-lāt') v.
strid·u·lat·ed, strid·u·lat·ing, strid·u·lates
v.
intr. To produce a shrill grating, chirping, or hissing sound by rubbing body parts together, as certain insects do. v.
tr. To produce by rubbing body parts together: "The crickets stridulated their everlasting monotonous meaningful note"(John Updike).
[From Latin strīdulus, stridulous; see stridulous.] strid'u·la'tion n., strid'u·la·to'ry (-lə-tôr'ē, -tōr'ē) adj.