This entry conflates two words with the same spelling but different accentuation, and confuses matters further by tacitly introducing meanings of another word entirely: see the notes below.
[1] The headword is the epic form for mi/a, feminine nominative singular (LSJ entry at web address 1). Same glossing in other lexica, including Apollonius' Homeric Lexicon, and cf. the scholia to Homer, Iliad 4.437.
[2] We now switch without warning to the poetic noun i)a/, Ionic i)h/: LSJ entry at web address 2, and cf. iota 219, omicron 949.
[3] The source of this second gloss (for i)a/) is unclear. Hesychius iota1 has (at this point) kai\ fwnh\ kai\ boh/ ("shout"), and i)/a does occur with this meaning once or twice in tragedy (see web address 2). The meaning "force/strength" belongs to i)/s (B): LSJ entry at web address 3.