| 单词 | diopter |
| 释义 | diopter[ dahy-op-ter ] / daɪˈɒp tər / nounOptics. a unit of measure of the refractive power of a lens, having the dimension of the reciprocal of length and a unit equal to the reciprocal of one meter. Abbreviation: D an instrument, invented by Hipparchus, to measure the apparent diameter of the sun or moon or to estimate the size or elevation of distant objects. Also especially British, di·op·tre . Origin of diopter1585–95; <Latin dioptra<Greek: instrument for measuring height or levels, equivalent to di-di-3 + op- (for ópsesthai to see) + -tra noun suffix of means OTHER WORDS FROM diopterdi·op·tral, adjectiveWords nearby diopterdiophantine equation, Diophantus, diopside, diopsimeter, dioptase, diopter, dioptometer, dioptre, dioptric, dioptric aberration, dioptrics Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for diopter
Medical definitions for diopterdiopter [ dī-ŏp′tər ] n.A unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length measured in meters. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
| 随便看 |
英语词典包含192737条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。