What is "scyllium ventricosum"

Swell \Swell\, n.

1. The act of swelling.

2. Gradual increase. Specifically:

   1. Increase or augmentation in bulk; protuberance.

   2. Increase in height; elevation; rise.

      Little River affords navigation during a swell to within three miles of the Miami.
      --Jefferson.

   3. Increase of force, intensity, or volume of sound.

      Music arose with its voluptuous swell.
      --Byron.

   4. Increase of power in style, or of rhetorical force.

      The swell and subsidence of his periods.
      --Landor.

3. A gradual ascent, or rounded elevation, of land; as, an extensive plain abounding with little swells.

4. A wave, or billow; especially, a succession of large waves; the roll of the sea after a storm; as, a heavy swell sets into the harbor.

   The swell Of the long waves that roll in yonder bay.
   --Tennyson.

   The gigantic swells and billows of the snow.
   --Hawthorne.

5. (Mus.) A gradual increase and decrease of the volume of sound; the crescendo and diminuendo combined; -- generally indicated by the sign.

6. A showy, dashing person; a dandy. [Slang]

   Ground swell. See under Ground.

   Organ swell (Mus.), a certain number of pipes inclosed in a box, the uncovering of which by means of a pedal produces increased sound.

   Swell shark (Zo["o]l.), a small shark ( Scyllium ventricosum) of the west coast of North America, which takes in air when caught, and swells up like a swellfish.