Stertor

Stertor (from Latin stertere 'to snore') is a term first used in 1804 ^[2] to describe a noisy breathing sound, such as snoring.^[3][4] It is caused by partial obstruction of the upper airways, at the level of the nasopharynx or oropharynx.^[1]

Not to be confused with stridor.

Stertor
Stertor caused by partial obstruction of the upper airways, at the level of the nasopharynx or oropharynx.[1]
Specialty	Otorhinolaryngology

It is distinguished from stridor by its pitch.^[4] Stertor is low-pitched, and can occur when breathing in, out or both.^[5] Stertor and stridor can occur together, such as when adenotonsillar hypertrophy and laryngomalacia occur together.^[5]