Usage: 4 forms in 6 verses
Form Translated As     In Verse(s)
μύασ mice LXX.1Sam.6.5LXX.1Sam.6.11
μυών of your mice LXX.1Sam.6.5
μυσ mice LXX.1Sam.6.18
mouse LXX.Lev.11.29
μυν mouse LXX.Isa.66.17

Liddell-Scott-Jones

μῦς (mus) a mouse G:N-M

μῦς,

(even of the female, [Refs 4th c.BC+]; θῆλυς [μ.] [Refs 2nd c.AD+]; genitive μῠός [Refs 5th c.BC+]; nominative plural μύες [] [μῦς 4th c.BC: Antiphanes Comicus 193, 3rd c.BC: Herodas Mimographus 3.76 ">Refs 5th c.BC+]; accusative plural μύας [] [μῦς 5th c.BC: Herodotus Historicus 2.141, 5th c.BC: Philyllius Comicus 13; \_dative\_ \_plural\_ μῡσί Hdn.Gr. 2.642, μῠσί (ν) Batrachomyomachia 174, 178, +others">Refs 5th c.BC+]:—mouse or rat, [Refs 3rd c.BC+]; μ. ἀρουραῖος literally the field-mouse, but probably hamster, Cricetus vulgaris, [Refs 5th c.BC+] [same place]; proverbial, μ. πίττης γεύεται, of one who tempted by some apparent good finds himself in inextricable difficulties, 'burn one's fingers', 'catch a Tartar', [μῦς.. γεύμεθα πίσσας 3rd c.BC: Theocritus Poeta Bucolicus 14.51 ">Refs 4th c.BC+]; ὅκως χώρης οἱ μῦς ὁμοίως τὸν σίδηρον τρώγουσιν, i. e. for lack of food, [Refs 3rd c.BC+] see entry {Γύαρο; κατὰ μυὸς ὄλεθρον}, of a lingering death, [Refs 4th c.BC+]; μ. λευκός a lewd person, [Refs 4th c.BC+]

__2 jerboa, Dipus aegyptiacus, [Refs 5th c.BC+]
__II a shell-fish, mussel, [Refs 5th c.BC+]
__III a large kind of whale, [Refs 4th c.BC+]; but μ. θαλάττιος file-fish, Balistes capriscus, = Latin mus marinus, [Refs 3rd c.BC+]; μ. θ. probably sea-water mussel, Heraclid.Tar. cited in [Refs 2nd c.AD+]
__IV muscle of the body, [Refs 5th c.BC+]
__V gag (as if from μύω), [Refs 3rd c.BC+]
__VI μυὸς ὦτα, see at {μυοσωτίς}. (Cf. Sanskrit mū´s, Latin mūs, OHG., O[Refs 5th c.BC+], ONorse mūs; the signification muscle (IV above) belongs also to OHG., O[Refs 5th c.BC+], ONorse mūs, Dutch muis, and to the diminutive, Latin musculus, cf. OSlavonic myšica 'arm' (literal 'little mouse'); compare σμῦς.)