tube

Reading level: hard

Estimated CEFR level: B2 — Upper-Intermediate

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
  2. noun electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  3. noun a hollow cylindrical shape

Etymology

From Middle French tube, from Latin tubus (“tube, pipe”), related to tuba (“long trumpet; war-trumpet”), of obscure ultimate origin, but possibly connected to tībia (“shinbone, reed-pipe”); see there. Doublet of tubus.

In classic literature

Synonyms

tubing

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