pyramid Definition

an ancient massive structure found especially in Egypt having typically a square ground plan, outside walls in the form of four triangles that meet in a point at the top, and inner sepulchral chambers

a structure or object of similar form

a polyhedron having for its base a polygon and for faces triangles with a common vertex

to speculate (as on a security or commodity exchange) by using paper profits as margin for additional transactions

to increase rapidly and progressively step by step on a broad base

to arrange or build up as if on the base of a pyramid

a usually illegal operation in which participants pay to join and profit mainly from payments made by subsequent participants

lake 30 miles (48 kilometers) long in northwestern Nevada northeast of Reno

an ecological hierarchy of food relationships in which a chief predator is at the top, each level preys on the next lower level, and usually green plants are at the bottom

a pyramid-shaped depiction of recommended daily servings for different food groups (such as vegetables, grains, dairy products, and meats)

any of the somewhat triangular- or wedge-shaped masses of tissue of the inner medulla region of the kidney that project as the renal papillae into the renal pelvis, and have a striated appearance due to the presence of collecting tubules and collecting ducts