The term WHITE RAT can be solved by the crossword solution ALBINO, which is a six letter word. An albino is an organism with a congenital absence of pigment in the skin, hair, and eyes due to absence or defect of tyrosinase, an enzyme involved in the production of melanin. Albinism is a genetic condition that results in a lack of pigmentation in the eyes, skin, and hair. White rats are a type of albino rat, which have white fur and pink eyes.