What does crepitation mean?
Crepitation refers to a series of small, sharp crackling or rattling sounds, or to the physical sensation such sounds can accompany. The word appears most often in technical contexts: physicians speak of crepitations when listening through a stethoscope to lungs affected by fluid, infection, or scarring, and orthopedists use it to describe the grating feel of broken bone ends rubbing together. Beyond medicine, writers reach for crepitation when describing the snap and sizzle of a fire, the crunch of dry leaves, or other delicate, rapid noises that 'crackle' alone might seem too plain to capture. It is a formal, somewhat literary word derived from the Latin verb crepitare, meaning to rattle or creak repeatedly. Though uncommon in casual conversation, it offers precision where ordinary vocabulary falls short, making it valuable in medical notes, descriptive prose, and scientific writing alike.
A series of slight, sharp crackling or rattling sounds.
"The crepitation of autumn leaves underfoot was the only sound in the lane."
In non-medical use, typically literary or descriptive.
(Medicine) A crackling sound heard over the lungs on auscultation, or a grating sensation produced by the rubbing of fractured bone fragments.
"Fine inspiratory crepitations at the bases prompted a chest radiograph."
Often used in the plural in clinical speech: 'crepitations'.
Standard plural; common in medical contexts where multiple sites or repeated sounds are described.
"Bilateral basal crepitations were noted on examination."
Doctors have listened for lung crepitations since the stethoscope era — that tiny rice-crispy snaple can reveal pneumonia before anything else does.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of crepitation
Crepitation comes from Latin crepitatio, meaning a rattling or crackling, formed on the frequentative verb crepitare ('to rattle repeatedly'), itself built on crepare, 'to creak or burst.' The word entered English in the early 17th century, initially in medical contexts describing joint or chest sounds. It shares its ultimate root crepare with several English words, including decrepit, crevice, and discrepancy.
Related word forms
How crepitation is actually used
Formal and largely technical in register. In everyday writing it is rare and often literary when describing fire or dry leaves; outside medicine, 'crackling' is far more common.
Easily confused with crepitation
Decrepitation is the specific crackling and bursting of crystals or minerals when heated (as in blowpipe analysis), whereas crepitation is any general crackling sound, including medical and everyday uses.
Crepuscule means twilight or dusk and derives from Latin crepusculum, entirely unrelated to crepitation's root meaning of cracking sounds.