What is the technical name for the hair of an eyelash?

The technical name for the hair of an eyelash is "cilia." This term specifically refers to the fine, hair-like structures that are found at the edges of the eyelids and serve to protect the eyes from dust and debris by acting as a barrier. Additionally, cilia play a role in the eye's sensory functions and contribute to the overall aesthetic appearance of the eyes.

While "hair shaft" refers to the visible part of the hair that protrudes from the skin, it is a more generic term that does not specifically denote the unique characteristics of eyelash hair. "Follicle" describes the skin structure from which hair grows but does not refer to the hair itself. "Pilus" is a broader term for any hair on the body; however, "cilia" is more precise and widely accepted in the context of eyelash hair. Understanding these distinctions helps clarify why "cilia" is the appropriate choice in this instance.