[cal.i.brate] vt -brat.ed ; -brat.ing (ca. 1864) 1: to ascertain the caliber of (as a thermometer tube)
2: to determine, rectify, or mark the graduations of (as a thermometer tube)
3: to standardize (as a measuring instrument) by determining the deviation from a standard so as to ascertain the proper correction factors
4: to adjust precisely for a particular function -- cal.i.bra.tor n