It is his magnum opus in literature, and exhibits wide and laborious research.
But you must learn the dictation; the great book, the magnum opus, it is there.
Say, Jack, how much brighter the world looks after a magnum!
I'll give you a dinner at the Bertolini to-night, and you may have the magnum of any vintage you like.
It has the punch of that .44 Magnum you're presently ...