While capillary is usually used as a noun, the word also is used as an adjective, as in "capillary action," in which a liquid is moved along — even upward, against gravity — as the liquid is attracted to the internal surface of the capillaries.

What do you mean by capillary or capillary action?

Capillary action is important for moving water (and all of the things that are dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.

What is capillary action example?

Answer: Water moving up in straw or glass tube against gravity, tears moving through tear ducts, water moving through a cloth towel against gravity. These are examples of capillary action.