What is the term for a narrow stripe that runs down the horse's nose?

The term for a narrow stripe that runs down the horse's nose is 'snip.' This specific marking is characterized by a small white or lighter-colored patch located in the center of the nose, particularly on the nasal bone or in the area of the muzzle. The snip is typically a distinct line that does not cover a large area and is often less pronounced than other facial markings.

In contrast to the snip, a blaze is a wider strip that generally covers a larger portion of the horse's face, often including the forehead and running down to the nostrils. An interrupted stripe refers to a stripe that is broken or has gaps, creating a less continuous marking. The coronet, on the other hand, refers to a marking at the top of a horse's hoof, specifically at the hairline where the hoof meets the skin, rather than a marking on the face.