Micrometer

(mi - krom'- et - er). An instrument designed for measuring exceedingly small dimensions. M., Eye-piece, a micrometer to be used with the eye-piece or ocular. M., Object or Objective. See M., Stage. M., Ocular, a micrometer to be used with the ocular. See Ocular . M., Stage, a finely divided scale or rule on gla or metal for determining the magnification of a compound microscope.