plural of pyramid piano

A piano that has its strings slanting upward from left to right in a case that is shaped like a tall isosceles triangle.

A graphical illustration of the distribution of a population (typically that of a country or region of the world) by age groups and sex; it typically forms the shape of a pyramid when the population is growing.

A form of pocket billiards played on a modified snooker table with narrower pockets.

Synonym of Russian pyramid

Synonym of multi-level marketing

(programming, informal) The presence of many levels of nested indentation in source code, making it difficult for a person to read.

Elimia potosiensis, a species of elimia snail.

(geometry) A nonright pyramid, where the apex is not centered over the base.

plural of pyramidal cell