pythagorean : Idioms & Phrases
Pythagorean letter
- . See
Y.
Webster 1913
Pythagorean proposition
(Geom.) , the theorem that the square described upon the hypothenuse of a plane right-angled triangle is equal to the sum of the squares described upon the other two sides.= Pythagorean theorem.
Webster 1913
Pythagorean system
(Astron.) , the commonly received system of astronomy, first taught by Pythagoras, and afterward revived by Copernicus, whence it is also called theCopernican system .