| 释义 |
pre·ci·sion
I. \prēˈsizhən, prə̇ˈs-\ noun
(-s)
Etymology: in sense 1, from Latin praecision-, praecisio act of cutting off, from praecisus (past participle of praecidere to cut off) + -ion-, -io -ion; in other senses, from French précision, from Latin praecision-, praecisio act of cutting off — more at precise
1. obsolete : prescinding, abstraction
2.
a. : the quality or state of being precise : exact limitation : exactness, definiteness
< defining words with utmost care, they fashioned their statements of doctrine with meticulous precision — C.A.Dinsmore >
< drove … emperors with the precision of an automation — Norman Douglas >
especially : the degree of refinement with which an operation is performed or a measurement stated
< the number, 2.42, shows a higher precision than 2.4, but it is not necessarily any more accurate — American Society of Civil Engineers >
— contrasted with accuracy
b.
(1) : the degree of agreement of repeated measurements of a quantity
(2) : the deviation of a set of estimates from their mean
3. : an instance of precision : nicety
< suspicion of the precisions of language — F.S.C.Northrop >
II. adjective
: marked by precision of execution or measurement
< a precision landing >
< a troop of precision dancers >
as
a. : adapted for extremely fine or accurate measurement, observation, or operation
< a precision level … will detect a variation of as little as .0025″ per foot — Metals & Alloys >
< precision cartography >
b. : held to low tolerance in manufacture or finishing
< a precision gear >
< a precision finish >
< precision parts >
III. noun
1. : the accuracy (as in binary or decimal places) with which a number can be represented usually expressed in terms of the number of computer words available for representation
< double precision arithmetic permits the representation of an expression by two computer words >
2. : relevance 1 herein |