(Statistics)a rule, method, or criterion for arriving at an estimate of the value of a parameter (统计)推算式 ■a quantity used or evaluated as such an estimate 估计量 ■a person who estimates the price, value, number, quantity, or extent of something 估计者;评价者
语源
early 17th cent. (in the sense 'person who estimates'): from Latin aestimator, from aestimare (see estimate)