The defiinition of a quadrant is "each of four quarters of a circle" but usually the circle is always considered as the diameters are placed like a +.
If i rotate the circle like in pic related can i refer to the quadrants as "north quadrant" the red in the pic and the others as east, west, south or it would be a nonsense, strictly to the math definition? In pic related it would mean "the two "r" are in the east and west quadrant. I don't know if i am clear by my request, i don't want to be caught by a more math-wise than me telling "actually you can't use quadrants with nswe".

>>1534100 (OP)
According to https://en.wikipedia.org/wiki/Circular_sector a quadrant is just a special name for a sector that happens to be 90 degrees. So you can use the word, no problem.

(But being right doesn't mean you won't get corrected anyway.)