1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium 2) the upper side of the thighs of a seated person 3) an enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia DOWN 1) a flat wing-shaped process or winglike part of an organism 2) a slight amount or degree of difference 3) a health resort near a spring or at the seaside ** Scroll down for solution. ** Are you sure you want to peek? ats lap ada