Refers to fat stored in one of the three primary locations: Sub-cutaneal fat (under the skin); Intra muscular fat (inside the muscle); Essential fat (covering for protection around internal organs).

Fat that cannot be produced by the body and must be supplied by the diet; Linoleic acid, linolenic acid, and arachidonic acid are essential fats.

fat n the body that is an essential part of the tissues, such as cell membrane structure, nerve coverings and the brain.