SUBSTRUCTURE

foundation, base, fundament, foot, groundwork, substructure, understructure

(noun) lowest support of a structure; “it was built on a base of solid rock”; “he stood at the foot of the tower”

infrastructure, substructure

(noun) the basic structure or features of a system or organization

Source: WordNet® 3.1

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Etymology

Noun

substructure (plural substructures)

The supporting part of a structure (either physical or organizational; the foundation).

The earth or gravel that the railway tracks are embedded in.

Synonyms

• (supporting part): underbuilding

Source: Wiktionary

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Sub*struc"ture, n. Etym: [Pref. sub- + structure.]

1. (Arch.)

Definition: Same as Substruction.

2. An under structure; a foundation; groundwork.

Source: Webster’s Unabridged Dictionary 1913 Edition

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