n. [ Gr. &unr_;, fr. &unr_; to besprinkle; kata` down, wholly + &unr_; to strew, or sprinkle. ] (Med.) A compound medicinal powder, used by the ancients to sprinkle on ulcers, to absorb perspiration, etc. Dunglison. [ 1913 Webster ]
n. an enzyme found in most plant and animal cells that functions as an oxidative catalyst; it decomposes hydrogen peroxide into hydrogen and water. [ WordNet 1.5 ]
n. an enzyme found in most plant and animal cells that functions as an oxidative catalyst; it decomposes hydrogen peroxide into hydrogen and water. [ WordNet 1.5 ]