substructure
1. lowest support of a structure - it was built on a base of solid rock - he stood at the foot of the tower • Syn: foundation, base, fundament, foot, groundwork, understructure • Derivationally related forms: basal (for: base) • Hypernyms: support • Hyponyms: bed, raft foundation • Part Holonyms: structure, construction 2. the basic structure or features of a system or organization • Syn: infrastructure • Hypernyms: structure • Part Holonyms: system
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