A sebaceous cyst is a type of cyst that forms in the epidermis, the outermost layer of the skin. A sebaceous cyst is also sometimes called an epidermal cyst.It forms when a sebaceous gland, an oil-producing gland in the skin, becomes blocked.This creates a sac that fills with a fatty yellow substance that can resemble cottage cheese. sebaceous cyst is a type of cyst that forms in the epidermis, the outermost layer of the skin. A sebaceous cyst is also sometimes called an epidermal cyst.
Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Unbidden(adj) not bidden; not commanded. 2  Unbidden(adj) uninvited; as, unbidden guests. 3  Unbidden(adj) being without a prayer.
Definition of morbid. 1a : of, relating to, or characteristic of disease morbid anatomyb : affected with or induced by disease a morbid conditionc : productive of disease morbid substances. 2 : abnormally susceptible to or characterized by gloomy or unwholesome feelings.