However, if you're looking for a lighthearted, playful term, some options could be:
* W.I.F.E. (Wonderful, Intelligent, Funny, Extraordinary)
* W.I.S.E. (Wonderful, Intelligent, Sweet, Extraordinary)
* W.I.L.D. (Wonderful, Incredible, Lovely, Darling)
Remember, these are just playful suggestions, and the best way to refer to your wife is however you both find comfortable and respectful.