What is "cushion capital"

Cushion \Cush"ion\ (k??sh"?n), n. [OE. cuischun, quisshen, OF. coissin, cuissin, F. coussin, fr. (assumed) LL. culcitinum, dim. of L. culcita cushion, mattress, pillow. See Quilt, and cf. Counterpoint a coverlet.]

1. A case or bag stuffed with some soft and elastic material, and used to sit or recline upon; a soft pillow or pad.

   Two cushions stuffed with straw, the seat to raise.
   --Dryden.

2. Anything resembling a cushion in properties or use; as:

   1. a pad on which gilders cut gold leaf;

   2. a mass of steam in the end of the cylinder of a steam engine to receive the impact of the piston;

   3. the elastic edge of a billiard table.

3. A riotous kind of dance, formerly common at weddings; -- called also cushion dance.
   --Halliwell.

   Cushion capital.(Arch.) A capital so sculptured as to appear like a cushion pressed down by the weight of its entablature. (b) A name given to a form of capital, much used in the Romanesque style, modeled like a bowl, the upper part of which is cut away on four sides, leaving vertical faces.

   Cushion star (Zo["o]l.) a pentagonal starfish belonging to Goniaster, Astrogonium, and other allied genera; -- so called from its form.