spdt

Etymology 1
From.

Noun

 * 1) effectiveness

Noun



 * 1) triangle

Proper noun

 * 1)  Sirius, A bluish-white star in the constellation Canis Major; Alpha (α) Canis Majoris. A vertex of the Winter Triangle and the brightest star in the night sky.
 * 2) Sothis, the divine personification of Sirius