capillary attraction


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capillary attraction

n.
The force that results from greater adhesion of a liquid to a solid surface than internal cohesion of the liquid itself and that causes the liquid to be raised against a vertical surface, as water is in a clean glass tube. It is the force that allows a porous material to soak up a liquid.
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Standing water would certainly dry in a short time during dry periods, but it could leave darker areas from constant moisture coming up through the concrete by capillary attraction and evaporation.
The book also cites bad design, such as a slated roof slope that is laid to too shallow a slope so that water soaks between the slates and up the slope by what''s called capillary attraction.
The doctrinal heart of Campbell's teaching lay in his near-mystical faith in the power of capillary attraction.