Is An inflammation of a sebaceous gland of the eyelid known as a hordeolum?

Yes, an inflammation of a sebaceous gland of the eyelid is known as a hordeolum, commonly referred to as a stye. It typically appears as a red, painful lump on the eyelid due to infection or blockage of the gland. Hordeolums can affect either the external or internal glands of the eyelid. Treatment often involves warm compresses and, in some cases, antibiotics.