Definitions for "Quadrangular"
Having four angles, and consequently four sides; tetragonal.
Having a truncate distal margin at approximately right angles to the lateral sides.
(L. quadrangulus: quadrangular) adj. Four-angled. Also quadrangulate.
Keywords:  rectangle, spore, square, shape
(spore) with shape of rectangle or square, l/w or l/b = 1.15.