(n.) An instrument for measuring minute distances or angles, often used with a microscope\. The measurement given directly is that of the image of the object formed at the focus of the object glass.

Gyrosin compass Johansson block RDF T square accept accomplish achieve acquire aesthetic distance alentours ambience ambit amount annex attain beleaguer beset besiege blockade border line borderlands bound boundaries boundary boundary condition boundary line bounds bourn bourns box in break boundary breakoff point bring off bring through cage caliber calipers carry carry off catch ceiling chain chamber chromatic scale circle circuit circuiteer circulate circumambiencies circumambulate circumference circumjacencies circummigrate circumnavigate circumscription circumstances circumvent clearance close close in close the circle come full circle compass about comprehend confine confines consummate contain context coop coop in coop up coordinates cordon cordon off corral crown with success cut cutoff cutoff point cycle deadline deal with deep space degree delimitation depths of space describe a circle determinant dial diapason dig dipstick direction finder discharge dispatch dispose of distance divergence dividers division line do do the job do the trick dodecuple scale domain edges effect effectuate embay embosom embrace enact encircle enclasp enclose enclosure encompass end enfold enharmonic scale enshrine entourage envelop environ environing circumstances environment environs enwrap execute extension extent extremity farness feeler gauge fence in fetch field finish flank floor foot rule fringes frontier fulfill gain gamut gauge block gestalt get get by gird girdle girdle the globe go about go around go round go the round goniometer grade gradiometer graduated scale grasp great scale gyre gyrocompass gyroscopic compass gyrostatic compass habitat have hedge hedge in height hem hem in high-water mark house in impound imprison incarcerate include inertial navigation system infinity interface interval invest involve jail kennel knock off land lap leaguer leap leeway length level light-years limen limit limitation limitations limiting factor limits line line of demarcation log log line loran low-water mark lower limit magnetic compass magnetic needle major scale make make a circuit manage march marches margin mark measure melodic minor mete meterstick metes metes and bounds mew mew up micrometer mileage milieu minor scale needle neighborhood notch nuance obtain octant octave scale orbit outlines outposts outskirts pale parameters parsecs pas peg pen pen in pentatonic scale perform perimeter