/
ˈpɪrəmɪd/
n.
- a monumental stone structure with a square or triangular base and sloping sides that meet in a point at the top, especially one built as a royal tomb in ancient Egypt.
- Geometry a polyhedron of which one face is a polygon and the other faces are triangles with a common vertex.
- Anatomy a pyramid-shaped structure, especially in the brain.
- a system of financial growth achieved by a small initial investment.
▸a form of investment in which each paying participant recruits two further participants, with returns being given to early participants using money contributed by later ones.
-
(pyramids)
[treated as sing.]
a game played on a billiard table with fifteen coloured balls arranged in a triangle and a cue ball.
v.
chiefly N. Amer. heap or stack in a pyramidal shape.
Derivative
- pyramidical
/-ˈmɪdɪk(ə)l/
adj. - pyramidically adv.
Etymology
ME: via L. from Gk puramis, puramid-.