capillary action

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capillary action

[′kap·ə‚ler·ē ′ak·shən]
(fluid mechanics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

capillary action, capillarity

1.The movement of a liquid in the interstices of soil or other porous material, as a result of surface tension.
2. The phenomenon responsible for dry soil sucking up moisture above the ground water level. Also see capillary flow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.