Webster's Revised Unabridged Dictionary · 1913

Distend

Distend , transitive verb

[Latin distendere, distentum, distensum; dis- + tendere to stretch, stretch out: compare French distendre to distend, détendre to unbend. See Tend, and compare Detent.]

1.
To extend in some one direction; to lengthen out; to stretch. [Rare]
But say, what mean those colored streaks in heaven Distended as the brow of God appeased? — Milton
2.
To stretch out or extend in all directions; to dilate; to enlarge, as by elasticity of parts; to inflate so as to produce tension; to cause to swell; as, to distend a bladder, the stomach, etc.
The warmth distends the chinks. — Dryden

Distend , intransitive verb

To become expanded or inflated; to swell.
His heart distends with pride. — Milton