name of the letter M, c. 1200, from Latin; the Greek name was mu. In printing, originally the square corresponding in dimensions to the capital M of that type.
since `em quad' is hard to distinguish from `en quad', printers sometimes called it a `mutton quad'
elvish
Elysian
Elysium
elytra
elytro-
em
em-
*em-
emaciate
emaciated
emaciation
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