Final answer:
A localized, circumscribed, inflammatory swelling of one of the several sebaceous glands of the eyelid is known as a chalazion, also called a stye.
Step-by-step explanation:
A localized, circumscribed, inflammatory swelling of one of the several sebaceous glands of the eyelid is known as a chalazion, also called a stye. It is a common condition that occurs when a gland in the eyelid becomes blocked or infected. The swelling is usually painful and can cause redness and tenderness around the affected area.