| 单词 | fundamental unit |
| 释义 | > as lemmasfundamental unit fundamental unit n. any of a collection of units in a system of measurement which are defined in terms of a physical object, property, or phenomenon, and from which other units in that system are derived, esp. (in later use) those of the International System of Units; cf. base unit n. 1. ΚΠ 1807 P. S. Laplace in T. Young Course Lect. Nat. Philos. I. x. 109 The fundamental unit of linear measures must be an aliquot part of the terrestrial meridian, which must correspond to one of the divisions of the circumference of a circle. 1940 Chambers's Techn. Dict. 3/1 Absolute unit, a unit which may be defined directly in terms of the fundamental units of length, mass, and time. 2015 L. Dartnell Knowledge xiii. 277 This international system of units..defines just seven fundamental units, including those for length, mass, time and temperature. < as lemmas |
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