Word or Phrase of the Day

I was just finishing up Stephen Ambrose's book, Pegasus Bridge, when I ran into a phrase I was unfamiliar with. Thanks to Google, I was able to decipher "Sine Qua Non" as,

(SY-nee kway NON)

noun
An indispensable condition; prerequisite.

Etymology
Latin sine qua non (without which no

Fancy that. I have a new phrase to add to my literary arsenal!

jp