There are faint ridges, perhaps the remnants of fluting.

The inner surface is silver grey and smooth, often with faint transverse ridges.

This inner surface also has faint but distinct vertical ridges, known as plications.

A faint white ridge of foam, thin, very thin, broke alongside.

A faint ridge of blond fuzz extended from her pubic hair to her navel, which was especially long and deep.

Moreover, there were faint, but definitely marked, ridges in the material.

I felt a faint ridge of fear prickling up along my spine, like a cat in the presence of aliens.

At this distance, Jake could see the faint ridges at the bridge of her nose.

He smiled, the faint ridges where he should have had eyebrows rising slightly, followed Adam into the small room and sat on the one chair.

At the posterior half is a series of faint transverse ridges.