steradian

[/stəˈreɪdiən/]
nounmasculinepl: steradians / steradianos
esterradiano
1. A unit of solid angle measurement in the International System of Units (SI), representing the solid angle subtended by a unit area on a unit sphere
The full sphere has a solid angle of 4π steradians.
A esfera completa tem um ângulo sólido de 4π esterradianos.
2. The standard measure used in photometry and radiometry to quantify the extent of a cone of light or radiation
The light intensity is measured in candelas per steradian.
A intensidade da luz é medida em candelas por esterradiano.
Steradian is a specialized scientific term used primarily in physics, engineering, and astronomy curricula. It is not commonly used in everyday conversation in either Brazil or the USA, but rather in academic and professional contexts. The term is standardized internationally and used identically across English-speaking and Portuguese-speaking scientific communities.
Synonyms / Sinônimos
solid angle unitangular measurement

Regional Variations

General Brazilian
esterradiano
Standard technical term used in physics and engineering education
Rio de Janeiro
esterradiano
Same as general Brazilian usage
São Paulo
esterradiano
Same as general Brazilian usage
Portugal
esterradiano
Identical to Brazilian Portuguese; technical term in European Portuguese

Related Words

radiansolid angleluminous intensitycandelaphotometryradiometrysphere
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