underframe
1. [ noun ] the internal structure that gives an artifact its shape
Synonyms: frame skeletal_frame skeleton
Examples:

"the building has a steel skeleton"

Related terms: supporting_structure hoop chassis ship building aircraft
Similar spelling:   unmoderated
  underage
  underarm
  underfed
  underfur
  underfelt
  undergarment
  underlayment
  underpayment
  undertake
  undersurface
  underrate
  under_arms
  understate
  undervalue
  underwater
  undertaker
  underhanded
  undercoated
  understated
  undermanned
  undersealed
  undercharge
  undersea
  underact
  underway
  underlay
  underpay
  undercurrent
  underdrawers
  understaffed
  undercoat
  underwear
  underactive
  Underdahl
  underachieve
  underfoot
  undergird
  undergrad
  underhand
  underhandedly
  underperform
  underlie
  under_way
  underpart
  underpass
  underivative
  underplay
  underseal
  undersize
  underachiever
  underside
  undershrub
  underworld
  undersell
  underbred
  underived
  underdone
  underpants
  underneath
  undermine
  underline
  undertone
  undertide
  underclass
  understand