What does mesomorph mean?
A mesomorph is a person with an intermediate body type in a traditional classification system that divides people according to physical build. The label is commonly associated with a balanced frame, broad shoulders, and a naturally muscular or athletic appearance, placing such a person between an ectomorph, traditionally described as lean and slender, and an endomorph, traditionally described as rounder and heavier. These categories became familiar through twentieth-century attempts to classify human physique, although modern anatomy and fitness assessment do not treat them as precise biological divisions. The word is still used in sport, fitness, and general conversation when describing a generally muscular build. Its name comes from Greek roots meaning “middle” and “form,” reflecting its original position as the intermediate category in the three-type system. The term is most appropriate when someone specifically uses the somatotype vocabulary or when describing the conventional visual stereotype of an athletic, balanced physique.
nounA person whose body is considered intermediate in somatotype, traditionally characterized by a balanced, relatively muscular build. In the older three-part system of body types, a mesomorph lies between an ectomorph and an endomorph.
- A person with an intermediate somatotype, traditionally associated with a balanced, muscular, athletic build.
"The athlete had the naturally muscular build of a classic mesomorph."
"The lifter was a natural mesomorph, with a balanced frame and well-developed musculature."
"Mesomorph, ectomorph, and endomorph are names from an older system of classifying human body types."
The plural is used when referring to multiple people classified as mesomorphs.
"The coach identified two mesomorphs in the group."
Mesomorph literally means “middle form,” a fitting name for the body type traditionally placed between the lean ectomorph and the heavier endomorph.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does mesomorph come from?
The word was formed in the early 20th century from Greek mesos, meaning “middle,” and morphē, meaning “form.” It was adopted as the name for an intermediate category in systems that classified human physique by body type. Its sense is therefore closely connected with the parallel terms ectomorph and endomorph, with the “meso-” element explicitly indicating the middle position.
Related word forms
How mesomorph is actually used
The term is chiefly used in discussions of physical build and older somatotype classifications. Because body types do not map neatly onto individual anatomy or personality, it is now more common in general discussion, sport, and fitness than in scientific assessment.
Easily confused with mesomorph
Mesomorph is a noun naming a person or body type, whereas mesomorphic is an adjective describing a balanced or muscular physical form.