Dictionary.net

Skin, integumentum commune.

The derma.

The corium, or deeper layer of the skin.

A dense, resisting membrane, of a flexible and extensible nature, which forms the general envelope of the body; and is continuous with the mucous membranes, through the different natural apertures. It is generally considered to be formed of three distinct layers- the epidermis, rete or more properly corpus mucosum, and corium (cutis vera, derma). Some anatomists, however, separate it into several others. It outer surface is covered by a number of small eminences, called papillae, which are generally regarded as essentially nervous and vascular. The skin is our medium of communication with external bodies. It protects the subjacent party; is the seat of touch; and through it are exhaled the watery part of the bloody, which are not needed in the nutrition of the body. The state of the skin, as regards heat and dryness, affords useful information in pathological investigations. In colour, too, requires attention: the paleness of disease is as characteristic as the rosy complexion of health. The colour of the skin varies according to the age, sex, &c. As a general rule, it is finer in the female and child than in the male and adult. In old age it become light-coloured, thin, and dry. It likewise varies according to the race, &c.

The true skin or derma.

The skin, consisting of the cutis vera, true skin, and the epidermis.

n. [Latin] A dense resisting membrane, next below the cuticle—the true skin.