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1. The supporting part of a structure; the foundation.
2. The earth bank or bed supporting railroad tracks.
1. a structure, pattern, etc, that forms the basis of anything
2. (Building) a structure forming a foundation or framework for a building or other construction
sub•struc•ture(sʌbˈstrʌk tʃər, ˈsʌbˌstrʌk-)
any foundation or supporting structure; basis.
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|Noun||1.||substructure - the basic structure or features of a system or organization|
system - instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"
structure - the manner of construction of something and the arrangement of its parts; "artists must study the structure of the human body"; "the structure of the benzene molecule"
|2.||substructure - lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"|
bed - a foundation of earth or rock supporting a road or railroad track; "the track bed had washed away"
raft foundation - a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
structure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
support - supporting structure that holds up or provides a foundation; "the statue stood on a marble support"