It was utterly friction-less, as if slick with some oily fluid- "What's this?

A colorless, oily fluid leaked from the ruined eye of the giant spider.

It secretes an oily fluid which is spread over the feathers by preening.

Its tear ducts ran with oily fluid, keeping its eyes moist.

These secrete an oily fluid which prepares your nipple area for feeding.

The bucket was half full of a cloudy' slightly oily fluid.

Black, oily fluid bubbled and popped in crater holes.

It seems that when a bone is broken, there is an oily fluid given off by the fracture.

Through the glass she could see an oily fluid.

A gush of oily gray fluid spilled from the cracked cowling.