Definition of "ϖ"

(mathematics) The lemniscate constant, a transcendental constant representing the ratio of the perimeter of Bernoulli's lemniscate to its diameter; approximately 2.62205755.  examples

(mathematics) diameter of a model κ-plane:  examples

(mathematics) uniformizer of a localisation of a number ring at a regular prime ideal:  examples

(astronomy) perihelion, etc.:  examples

(fluid dynamics) angular frequency of a wave  examples