capillary tube

noun

1. a glass tube with a fine bore and thick walls, used in thermometers, etc

Example Sentences

Now heat the bulb again, and at the same time heat the capillary tube over a second burner.

From Project Gutenberg

The thermometer is filled and the top of the capillary tube closed by the use of a small blowpipe flame.

From Project Gutenberg

The capillary tube is introduced and sealed in position, care being taken to expand the joint a little.

From Project Gutenberg

Cut off the capillary tube exactly at the upper level of the column of mercury, invert it and allow the mercury to run out.

From Project Gutenberg

With a glass-cutting knife cut the capillary tube through at the point "b," and allow the mercury to run out.

From Project Gutenberg