PachometerPa*chom"e*ter\, n. [Gr. pa`chos thickness + -meter.] (Physics) An instrument for measuring thickness, as of the glass of a mirror, or of paper; a pachymeter.
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|