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en·tre·sol(ĕn′tər-sŏl′, ĕn′trə-, ŏn-trə-sôl′)
A mezzanine, especially one just above the ground floor of a building.
[French : entre-, between (from Latin inter-; see inter-) + sol, floor (from Latin solum).]
entresol(ˌɒntrəˈsɒl; French ɑ̃trəsɔl)
(Architecture) another name for mezzanine1
[C18: from French, literally: between floors, from entre- inter- + sol floor, ground, from Latin solum]
en•tre•sol(ˈɛn tərˌsɒl, ˈɑn trə-, ˈɛn-)
a low story in a building between the ground floor and the floor above; mezzanine.
[1765–75; < French: literally, between-floor =entre- inter- + sol floor < Latin solum ground]