What is "puckers"

Usage examples of "puckers".

From his angle he could see rounded firm buttocks, and above the dark blond fuzz of pubic hair, the curve of a stomach traced with the slight puckers of stretch marks from pregnancy.

I said, and I lifted the mask above the ruins of my mouth, and I drank, sighting along the inside lining to regard his inquisitive, acquisitive stare at the puckers into which I poured some drink.

I was blushing, and I was pleased that neither I nor anyone else could see the furrows and puckers and craters of my face go crimson with what might be shame.