Characterized or affected by seborrhea; seborrhoic; seborrheal: In newborn babies, the "cradle cap", which refers to the scalp of the head, is quite usual in infants, and the technical term is seborrheic dermatitis.

Afflicted with or like seborrhea: Seborrheic areas of the body are those in which sebaceous glands are abundant, for example, the scalp, face, chest, back, axilla (armpit), and groin.

A region of the body where sebaceous glands are numerous: Seborrheic areas, for example, are the scalp, the sides of the nose, the chin, the center of the chest, the back, the axilla (armpits), and the groins.

An obsolete term for a conjunctivitis associated with chronic inflammation of the meibomian glands: Mrs. Hathaway suffered from seborrheic blepharoconjunctivitis, which could characterize her eyes as having swollen tarsal plates and frothy seborrheic secretion.

A form of inflammatory skin rash that results from excess activity of the sebaceous glands in the skin; dermatitis seborrheica; eczema seborrheicum: Seborrheic dermatitis is an acute, long-term inflammatory form of dermatitis, occurring usually on oily skin in areas having large sebaceous glands.

Seborrheic dermatitis is characterized by dry, moist, or greasy scales and by crusting yellowish patches, remissions, exacerbations, and itching.

A benign skin lesion or non-cancerous tutmor resulting from excessive growth of the top layer of skin cells: Seborrheic keratosis is composed of squamous and basaloid cells that are arranged in various patterns to produce a brown papule, studded with yellow collections of keratotic material giving the sores a greasy appearance.

Seborrheic keratosis is usually found in persons over 30 years old and may be only a few or even numerous.