喜樂美語
  1. 1

    The radius of a circle is the distance from the center point straight out to the edge - it's half the distance across the whole circle, the diameter. People also use 'radius' loosely to talk about an area around a point, like 'within a five kilometer radius,' meaning anywhere inside a five-kilometer circle around that spot.

    半徑；範圍

    例句逐字對照、搭配詞、易混淆字

    這一義的完整解析還沒打開。訂閱後可以看到例句怎麼拆、常跟哪些字一起出現， 以及容易跟它搞混的字。

    看看訂閱內容

組成Comes from the Latin word for a rod or the spoke of a wheel - which is also why one of the bones in your forearm is called the radius.

同家族的字

  • radiateshares the same Latin root meaning 'ray' or 'rod' - to spread out from a center point, like light or heat
  • radioalso from that root - originally about signals spreading out like rays

原始詞典資料9 筆記錄

以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。

radiusnoun/ˈɹeɪ.di.əs/

  • 1

    anatomymedicinesciencesThe long bone in the forearm, on the side of the thumb.

    • It is also obvious, and proved by experiment, that the rotatory motions observed in the hand proceed from the rotatory motions of the radius.
  • 2

    biologynatural-scienceszoologyThe lighter bone (or fused portion of bone) in the forelimb of an animal.

  • 3

    biologyentomologynatural-sciencesOne of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.

  • 4

    geometrymathematicssciencesA line segment between any point of a circle or sphere and its center.

    • Fatima claims to have visited all the bars within a five-mile radius of her Manhattan apartment.
    • We start with spherical geometries. The two geometries on spheres of radiuses R₁ and R₂ are obviously identical if R₁ = R₂; moreover, the converse also holds.
  • 5

    geometrymathematicssciencesThe length of this line segment.

    • This contribution reduces with increasing distance p from the emitting surface element dA, due to conservation of energy, as the wave energy distributed across the spherical wave front remains constant, while the radius increases during ...
  • 6

    Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.

    • […] I can do more with a Quadrant, Sextant or Octant, of 1 foot Radius, furniſhed with Teleſcopical Sights and Screws, then ^([sic]) can poſſibly be done with any other Inſtrument, furniſhed only with Common Sights, though 10, 20, 30, nay threeſcore foot Radius; […]
  • 7

    graph-theorymathematicssciencesThe minimum eccentricity of any vertex, for a given graph.

radiusverb/ˈɹeɪ.di.əs/

  • 1

    To give a rounded edge to.

    • A comfortable grip is ensured by smoothing the surface of the handle and radiusing the edge.

這個拼法也被記錄為下列字的變化形：

資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。