capillary tube
Noun
Meaning
a tube of small internal diameter; holds liquid by capillary action
Source: WordNetSynonyms
Hypernyms
Examples
A small amount of bacteria is collected on the end of the capillary tube (it is essential to ensure that the end is not blocked, otherwise it may present a false negative).
Ink was transferred through a further capillary tube to the nib.
M is a capillary tube where approximately 0.1 mm 3 were isolated.
T. Duncan (1973) Advanced Physics: Materials and Mechanics (John Murray, London) ISBN 0-7195-2844-5 There may be other causes due to imperfections in the instrument, e.g. in a liquid-in-glass thermometer if the capillary tube varies in diameter.