Distention

1. n. Breadth; extent or space occupied by the thing distended.
2. n. The act of distending; the act of stretching in breadth or in all directions; the state of being Distended; as, the distention of the lungs.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.