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Rattle (Noun)

Loosely connected horny sections at the end of a rattlesnake's tail.

Nouns denoting animals.

A rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders); "the death rattle".

Nouns denoting natural events.

The doctor listened carefully to the patient's chest with her stethoscope, trying to distinguish the rattle of fluid in the lungs from the wheeze of asthma.
As the old man lay dying, his family gathered around him, listening to the ominous death rattle that signaled the end was near.
The patient's rattle was so loud that the nurse could hear it from across the room, a sign that the pneumonia was worsening.
The doctor explained that the rattle in the patient's chest was caused by the buildup of mucus and fluid, which was obstructing the airways.
The sound of the rattle in the patient's lungs was a stark reminder of the severity of the illness and the need for immediate treatment.