slits

It consists of a compass whose needle plays over a circle graduated to 360�, and of a horizontal brass bar at the ends of which are standards with narrow slits for sighting, supported on a tripod by a ball and socket joint. n

when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

n a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted

a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted

One who, or that which, slits.