formfactor

Any of various calculations representing the shape or distribution of a physical property within a microsystem such as an elementary particle or atomic nucleus.

The value of 4π * area / perimeter², used to measure how well an irregular shape approximates an idealized regular shape, and used to estimate surface area of irregular shapes.

The ratio of energy radiating out from one patch to the energy absorbed by another patch, used in the calculation of radiosity.

An industry standard that represents the size and shape of a circuit board.