What is the term for a swollen, reddish bump on the eyelid caused by a bacterial infection of a Meibomian gland?

The term for a swollen, reddish bump on the eyelid caused by a bacterial infection of a Meibomian gland is indeed a stye. A stye, or hordeolum, specifically refers to the localized infection that results in a painful lump, often near the edge of the eyelid. The Meibomian glands, which are responsible for secreting oil to keep the eye moist, can become blocked or infected, leading to this characteristic bump.

This condition often presents with symptoms such as redness, tenderness, and swelling, and it can be accompanied by discomfort or irritation of the eye. Prompt treatment can help alleviate symptoms and may involve warm compresses or, in some cases, antibiotics.

Other terms mentioned in the options refer to different conditions. Conjunctivitis is an inflammation of the conjunctiva, usually resulting in redness and discharge but not specifically involving a Meibomian gland. Blepharitis is an inflammation of the eyelid margins, affecting the eyelashes and oil glands but not producing the distinct bump associated with a stye. Choroid refers to a layer of blood vessels in the eye and is unrelated to eyelid infections.