steradiann.

Brit.

/stəˈreɪdɪən/, U.S.

/stəˈreɪdiən/

Etymology: < Greek στερεός solid + radian n.

Geometry.

A unit of measurement of solid angles (see quot. 1881).

ΘΚΠ

the world > relative properties > number > geometry > angle > [noun] > degree > other measurements of angles

grade1801

radian1874

steradian1881

rad1913

grad1959

sr-

1881 G. B. Halsted Mensuration 78 A steradian is the angle subtended at the center by that part of every sphere equal to the square of the radius.

1883 W. Thomson in Encycl. Brit. XVI. 25/2 Number of Steradians in an Angle.

1885 A. Macfarlane Physical Arithm. 87 The unit-rate S per (L radius)² is sometimes called a steradian, that is, a solid radian.

This entry has not yet been fully updated (first published 1916; most recently modified version published online June 2018).

单词	steradian
释义	steradiann. Brit. /stəˈreɪdɪən/, U.S. /stəˈreɪdiən/ Etymology: < Greek στερεός solid + radian n. Geometry. A unit of measurement of solid angles (see quot. 1881). ΘΚΠ the world > relative properties > number > geometry > angle > [noun] > degree > other measurements of angles grade1801 radian1874 steradian1881 rad1913 grad1959 sr- 1881 G. B. Halsted Mensuration 78 A steradian is the angle subtended at the center by that part of every sphere equal to the square of the radius. 1883 W. Thomson in Encycl. Brit. XVI. 25/2 Number of Steradians in an Angle. 1885 A. Macfarlane Physical Arithm. 87 The unit-rate S per (L radius)² is sometimes called a steradian, that is, a solid radian. This entry has not yet been fully updated (first published 1916; most recently modified version published online June 2018). < n.1881
随便看	θ88545 θ88546 θ88547 θ88548 θ88549 θ8855 θ88550 θ88551 θ88552 θ88553 θ88554 θ88555 θ88556 θ88557 θ88558 θ88559 θ8856 θ88560 θ88561 θ88562 θ88564 θ88565 θ88566 θ88568 θ88569