ectomorphy
ec·to·morphy
noun
1.
slender, weak, and lightweight
Origin
From ecto- + -morphy.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.