a miscarriage (particularly used in online forums)

I suffered a mc at 13 weeks last year

megacycle(s), a unit of frequency equal to one million cycles

(in the UK and Commonwealth countries) a decoration awarded for distinguished active service on land, instituted in 1914 (originally for officers)

the chance to vote for their MC

a person who provides entertainment at a club or party by instructing the DJ and performing rap music

perform as an MC

he's MC'd at all of our parties

(in the UK) Military Cross

he was awarded the MC

Monaco (international vehicle registration)

music cassette

it is now available on Deutsche Grammophon CD and MC