A protuberance; a prominence

an unnatural prominence or protuberance; as, a scrofulous swelling.

abnormal protuberance or localized enlargement

In the water treatment context, the expansion of certain ion exchange resins when converted into specific ionic states.

The expansion of certain ion exchange resins when converted into a specific ionic state.

Burdock and Comfrey.

The property of a raw or vulcanized rubber of absorbing organic liquid, such as benzene and gasoline, and swelling to many times it's original volume; the property is also shown by other colloids in contact with other liquids; in a general sense, it may be any increase in volume in a solid substance caused by the absorption of a liquid.

compatible fluids will migrate into the mass of a rubber article, which usually results in a gain in volume of the affected portion of the part; the more compatible the fluid, the greater the volume increase, which can sometimes be well over 100

An increase in the dimensions of wood resulting from an increase in moisture content. Swelling occurs tangentially, radially, and, to a lesser extent, longitudinally.

see oedema.

In textile usage, expanding of a fiber caused by the influence of a chemical, solvent or agent. A property often used to facilitate dying.

The act of that which swells; as, the swelling of rivers in spring; the swelling of the breast with pride.

RG Battery cases swell or bulge when the cell vent valves maintain an internal pressure that is greater than the outer (atmospheric) pressure.

The accumulation of water in a soil aggregate without causing the aggregate to break down. T-U

the swelling of certain substances when they are heated (often accompanied by release of water)

When tissue next to any part of the device is swollen.