Whisker (noun)

1. A stiff hair growing from the human or animal face, especially on the upper lip.
2. A hair or bristle growing from the face of an animal.

Origin:

From the old english word "whisc" meaning "a hair".

Examples:

1. The old man had a long white whisker.
2. He had a thick mustache and a few whiskers on his chin.
3. The cat's whiskers twitched as it smelled the food.
4. The mouse's whiskers were long and sensitive.
5. The snake"s whiskers are called "vibrissae" and are used to sense the environment.