underframe
un·derf·rame
noun
1.
the internal supporting structure that gives an artifact its shape
- “the building has a steel skeleton”
Origin
From under- + frame.
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.