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Sport & ContestGreekEnglish

Ectomorph

/ˈɛktəmɔrf/noun

A person of lean, narrow build who gains weight and muscle with difficulty.

The Greek roots

ἐκτός
ektós
outside, external
+
μορφή
morphḗ
form, shape

Literally: outer form

The story of the word

Sheldon took his three names from the embryo in 1940. The outermost germ layer, the ectoderm, becomes skin and nervous system, so the long thin body was tied to the nervous temperament by nothing stronger than an analogy. The link was never demonstrated, but gyms and diet books wanted three tidy labels and kept them.

How it travelled
Ancient Greek → scientific coinage → English
First recorded
1940

Same family

mesomorphendomorphmorphologyamorphous

In a sentence

He calls himself an ectomorph and eats accordingly.

Distance runners cluster at the ectomorph end without anyone selecting for it.

Built on the same root

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