adjective. resembling horn; horny. resembling corneal tissue.

What does keratosis mean in medical terms?

Keratosis: A localized horny overgrowth of the skin, such as a wart or callus. Among the common types of keratosis are actinic keratosis and seborrheic keratosis.

What's the meaning of actinic?

: of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum actinic light actinic keratosis.