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A standard or reference material or substance used to standardize or calibrate an instrument or laboratory procedure.
1 an instrument used to measure the size of an opening.
2 an instrument used to increase the diameter of an opening, such as a dilator of a urethral stricture.
calibratorA solution of a known concentration which is weighed or determined by repetitive testing using a reference or definitive method that spans a reportable range.
A standard or reference material or substance with a known value that is used to standardize or calibrate an instrument or laboratory procedure.
an instrument for dilating a tubular structure or for determining the caliber of such a structure.