nival - definition of nival by The Free Dictionary
ni·val (n v l) adj. Of, relating to, or growing in or under snow: nival species of plants. [Latin niv lis, from nix, niv-, snow; see sneig w h-in Indo-European roots.] nival (ˈnaɪvəl) adj 1. (Botany) of or growing in or under snow [C17: from Latin nivālis...