shadow roll

noun

1. sheepskin that is placed just below the eyes of a pacing horse in order to prevent it from seeing moving shadows cast by its body.

Example Sentences

So even the parade to the post belonged to Silky, his red coat gleaming through the muggy afternoon, a red shadow roll across his nose and a red ribbon braided into his tail.

From Time Magazine Archive

Candace stood still a moment, and the spectators saw a deeper shadow roll over her sable face, like a cloud over a dark pool of water, and her immense person heaved with her labored breathing.

From Project Gutenberg