steradian

POS

Noun

HYPHEN

ste=ra=di=an

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WORDNET DICTIONARY

Noun steradian has 1 sense

steradian(n = noun.quantity) sr - the unit of solid angle adopted under the Systeme International d'Unites; Array

is a kind of angular unit

is a part of sphere

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OXFORD DICTIONARY

steradian, n. the SI unit of solid angle, equal to the angle at the centre of a sphere subtended by a part of the surface equal in area to the square of the radius.

Usage

Abbr.: sr.

Etymology

Gk stereos solid + RADIAN

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