Sub-base
Pronunciation : Sub"-base`
Part of Speech : n.
Definition : Defn: The lowest member of a base when divided horizontally, or of a baseboard, pedestal, or the like.
(Arch.)
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder