What is cutaneous evaporative water loss

Cutaneous = skin
Evaporative = liquid to gas state change
Water Loss = loss of water

So, the loss of liquid water by conversion to gaseous water through the skin.

Resistance to cutaneous evaporative water loss has been examined in anuran amphibians that occupy a variety of habitats, except for the ocean. We measured evaporative water loss rate and cutaneous resistance to evaporation in the Crab-eating Frog, Fejervarya cancrivora, a euryhaline species that enters the sea.

Skin. Used, of course, for protection for external insults and protectin from water loss...!!