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tube (n.)

1610年代, 源于法语 tube (15世纪), 来自拉丁语 tubus “管子, 管道”, 词源不明. 伦敦地铁还未开通就被命名为 Twopenny Tube (H. D. Browne, 载于1900年6月30日的“伦敦人” ); “圆柱形铁路隧道” 的 tube, 从1847年开始得到证明. “以电视为媒介” 的含义来自1959年, 简称 cathode ray tubepicture tube. Tube top 作为一种女装风格的含义是在1972年被证实的. Tube steak 1963年有“frankfurter” 的记载, 80年代中期有“penis” 的俚语.

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Definitions of tube from WordNet
1
tube (n.)
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases;
Synonyms: tubing
tube (n.)
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope;
Synonyms: vacuum tube / thermionic vacuum tube / thermionic tube / electron tube / thermionic valve
tube (n.)
a hollow cylindrical shape;
Synonyms: pipe
tube (n.)
(anatomy) any hollow cylindrical body structure;
Synonyms: tube-shaped structure
tube (n.)
an electric railway operating below the surface of the ground (usually in a city);
in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'
Synonyms: metro / underground / subway system / subway
2
tube (v.)
provide with a tube or insert a tube into;
tube (v.)
convey in a tube;
inside Paris, they used to tube mail
tube (v.)
ride or float on an inflated tube;
We tubed down the river on a hot summer day
tube (v.)
place or enclose in a tube;
From wordnet.princeton.edu