arcus

vanhuudenkaari puhekieltä A white band of cholesterol that forms at the edge of the cornea
puhekieltä A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow
puhekieltä An elastic band around the base of the arolium, a pad at the end of the leg of certain insects
puhekieltä An arc-shaped band of thickened sexine extending between two apertures on a pollen grain or spore
arc
bow (arc-shaped weapon used for archery)
rainbow