stridu-, strid-

(Latin: creaking, making a creaking sound; a shrill sound; a harsh sound)

laryngismus stridulus (spasmus glottidis)
A spasmodic closure of the glottis, causing noisy inspiration.
laryngitis stridulosa (spasmodic laryngitis)
Infectious inflammation of the larynx in children, accompanied by night attacks of spasmodic closure of the glottis, causing inspiratory stridor (crowing sound during the inspiratory [inhalation or breathing in] phase of respiration due to pathology [disease] involving the epiglottis or larynx).
strident (adjective), more strident, most strident
1. A reference to a harsh, loud, grating, or shrill tone or sound: Greg's strident laughter was so deafening while he was watching cartoons on TV that his roommate had to wear ear plugs in order to go to sleep!
2. Pertaining to an opinion or feeling which is loudly, strongly, or urgently expressed: Mr. Smith was demanding the resignation of his fellow worker in a very strident and forceful way.
3. Relating to something which has a piercing and irritating quality or character: The author had strident and penetrating tones in his writings.
5. Etymology: from Latin stridentem, stridens and stridere "to utter an inarticulate sound, to grate, to screech."
Referring to shrill sounds.
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Conveying to harsh sounds.
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1. A harsh, shrill, grating, or creaking sound.
2. A harsh, high-pitched sound in inhalation or exhalation.
A reference to grasshoppers, cicadas, crickets, etc: to make a chirruping sound by rubbing certain body parts together.
stridulate, stridulatory
1. To produce a shrill grating, chirping, or hissing sound by rubbing body parts together; as certain insects do.
2. The sounds made by crickets, cicadas, grasshoppers, and other summertime insects when they rub special body parts together to make their shrill sounds.
1. A shrill grating or chirping noise made by some insects by rubbing their body parts together.
2. A high-pitched squeaking or chirping sound made by a grasshopper, crickets, cicadas, etc.
1. Making a shrill, creaking sound.
2. Making a small harsh sound or a creaking.

Stridulous laryngitis, a form of croup, or laryngitis, in children, associated with dyspnoea, occurring usually at night, and marked by crowing or stridulous breathing.