clouding

WORDNET DICTIONARY

clouding(n = noun.process) clouding up - the process whereby water particles become visible in the sky;

is a kind of evaporation, vapor, vaporisation, vaporization, vapour

Derived form verb cloud₁

clouding, n.

A mottled appearance given to ribbons and silks in the process of dyeing. [1913 Webster]
A diversity of colors in yarn, recurring at regular intervals. Knight. [1913 Webster]