noun🔗ShareEstereorradiánIn the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r2. Symbol: sr"The lamp's reflector concentrates the light into a solid angle of approximately one steradian, providing focused illumination. "El reflector de la lámpara concentra la luz en un ángulo sólido de aproximadamente un estereorradián, proporcionando una iluminación enfocada.mathphysicsunitChat with AIVocabulary GamePractice Reading