A somewhat old-fashioned term used to classify the human shape into three primary types: ectomorphic (a lean, only slightly muscular body with long limbs), mesomorphic (a robust muscular body-build characterized by predominance of structures; including bone and muscle and connective tissue; with pronounced muscular development and low body fat), or endomorphic (characterized by big bones, round face, large trunk and thighs and a naturally high degree of body fat; especially, around the midsection).