Undergrading

(redirected from Under-Grading)

Undergrading

In numismatics, the act or practice of appraising a coin for less than it is actually worth. This is an unethical practice, often conducted by persons who are trying to buy a valuable coin without paying full price.
References in periodicals archive ?
However, biopsy may miss or under-grade prostate cancer: false-negative rates of the first sextant biopsy approach 17%, upgrading on subsequent biopsy approaches 20% and under-grading rates are 30% to 50%.