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Endomorph

/ˈɛndəmɔrf/noun

A person of rounded, soft build who gains weight easily and loses it slowly.

The Greek roots

ἔνδον
éndon
within, inside
+
μορφή
morphḗ
form, shape

Literally: inner form

The story of the word

The innermost germ layer, the endoderm, becomes the lining of the gut, so Sheldon in 1940 gave the round build the inward name and tied it to a comfortable temperament. Mineralogists had used endomorph a century earlier for one crystal grown inside another, and that sense quietly died. Fitness writing now treats the three types as fixed categories, which is the one thing Sheldon's own scoring system refused to do.

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

Same family

ectomorphmesomorphendocrineendoscopy

In a sentence

Calling yourself an endomorph is a poor substitute for reading the training plan.

The magazine sorted its readers into endomorphs and everyone else.

Built on the same root

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