The word "Kuhn" is not commonly used as a regular English word in everyday conversation. Instead, it refers to a specific person, specifically an Austrian chemist named Richard Kuhn (1900-1967). He is known for his research on carotenoids, which are pigments found in plants that give them color, and vitamins, which are essential nutrients for our health.
In summary, "Kuhn" refers specifically to Richard Kuhn, a notable chemist known for his research on carotenoids and vitamins.