MIDMOST
middlemost, midmost
(adjective) being in the exact middle
midmost, in the midst
(adverb) the middle or central part or point; “in the midst of the forest”; “could he walk out in the midst of his piece?”
Source: WordNet® 3.1
Etymology
Adjective
midmost (not comparable)
In the exact middle, or nearest to the exact middle; middlemost
Source: Wiktionary
Mid"most`, a. Etym: [OE. middemiste. Cf. Foremost.]
Definition: Middle; middlemost.
Ere night's midmost, stillest hour was past. Byron.
Source: Webster’s Unabridged Dictionary 1913 Edition