The Collaborative International Dictionary
Stridulous \Strid"u*lous\, a. [L. stridulus. See Strident.]
Making a shrill, creaking sound.
--Sir T. Browne.
The Sarmatian boor driving his stridulous cart.
--Longfellow.
Stridulous laryngitis (Med.), a form of croup, or laryngitis, in children, associated with dyspn[oe]a, occurring usually at night, and marked by crowing or stridulous breathing.
Douglas Harper's Etymology Dictionary
1610s, from Latin stridulus "giving a shrill sound, creaking," from stridere "to utter an inarticulate sound, grate, creak" (see strident). Stridulation is from 1831. Stridulate (v.) first recorded 1838. Related: Stridulated; stridulating; stridulously; stridulousness.
Wiktionary
a. 1 Emitting a particularly harsh or shrill sound. 2 (context pathology English) Relating to stridor.