METAMOR: a new word for positive, older people...GROWING older (not getting older)

I was thinking that there needs to be a new word to replace "senior" in our language. I was thinking that aging brings about change....physical, emotional, social, spiritual, and intellectual changes. The new word needs to describe that I began to think of butterflies and the change they undergo getting there. Metamorphosis came to mind...and then "metamor" emerged from that word. Now, not everyone who is getting older can be a "metamor".