Definition of ossature in US English:

ossature

noun

rare
  • 1Something resembling a skeleton; a framework or underlying structure.

  • 2Architecture. The skeleton or framework that supports a structure, as the ribs of a vault, the beams of a roof, or the frame of a window.

Origin

Mid 19th century; earliest use found in Journal of the Royal Geographical Society of London. From French ossature from classical Latin oss-, os bone + French -ature -ature, probably after French musculature musculature.