What is "plummets"

Usage examples of "plummets".

Then I could feel the lead plummets at the ends of the' lashes, cutting through the flesh of my shoulders.

He'd stripped all the flesh off my bones, and the plummets of the whip were rattling on my dry rib bones: And I knew that I was dead, but it didn't matter.

For the next five or ten minutes, bales of brown stuff erupt from the water, released from the cargo holds as the ship plummets towards the bottom.

A fourteen-year-old girl in a bloody nightgown plummets down from the fifth floor of the hotel, thuds into the ground like a sack of cement, and bounces once.