Raisinisation 

The gradual onset of a wrinkled, raisin like texture on the skin (esp the extremities) after spending too long in water.

Johnny was in the bath for over three hours and succumbed to a serious case of raisinisation.

Raisinisation by bigcoolme September 2, 2011

Raisinization 

The effect of prolonged water on your skin making it wrinkle like a raisin.

I took a very long bath tonight and my fingers have severe raisinization.

Raisinization by Tman1220 May 3, 2014