Definition of capillary action
: capillarity 2 The liquid returns to the evaporation section of the heat pipe along a wick by means of capillary action. — Science News, 22 July 1989
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First Known Use of capillary action
CAPILLARY ACTION Defined for Kids
Definition of capillary action for Students
: the action by which the surface of a liquid where it is in contact with a solid (as in a capillary tube) is raised or lowered
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