Meaning of umbra recta | Babel Free
/ˈʌmbɹə ˈɹɛktə/Definitions
On a shadow in the shape of a right triangle, the length of the shadow's edge adjacent to a measured angle.
Examples
“Scheubelius a great Mathematician, but by book only, and not by practice who being required ſometime in an Army to make uſe of his Quadrant, knew not the difference between umbra recta, and umbra verſa.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.