The Collaborative International Dictionary of English v.0.48:

Pyramidoid \Py*ram"i*doid\, n. [Gr. ?, ?, pyramid + -id: cf. F.
   pyramido["i]de.]
   A solid resembling a pyramid; -- called also pyramoid.
   --Barlow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pyramoid \Pyr"a*moid\, n.
   See Pyramidoid.
   [1913 Webster]