喜樂美語
  1. 1

    A lumen is a unit used to measure how much light a bulb or lamp gives off - the higher the lumens, the brighter the light. It's printed on light bulb packaging alongside or instead of watts. In biology, 'lumen' also means the hollow, open space inside a tube-shaped body part, like the inside of a blood vessel or the .

    （物理）流明（亮度單位）；（生物）管腔（血管、腸道內部的空腔）

    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。

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組成from a Latin root meaning 'light.'

同家族的字

  • luminousshares the same root meaning 'light'
  • illuminateshares the same root meaning 'light'

原始詞典資料4 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。

lumennoun/ˈluːmən/

  • 1

    natural-sciencesphysical-sciencesphysicsIn the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.

  • 2

    anatomymedicinesciencesThe cavity or channel within a tube or tubular organ.

  • 3

    biologybotanynatural-sciencesThe cavity bounded by a plant cell wall.

  • 4

    medicinesciencesThe bore of a tube such as a hollow needle or catheter.

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。