欧氏几何学 ōushìjǐhéxué Euclidean geometry Definitions Defs Origin Strokes Stroke Words Sentences Sents 欧氏 歐氏 ōushì Euclid (bound form) Euclid; Euclidean; abbreviation for 欧几里得 ōujǐlǐdé几何学 幾何學 jǐhéxué geometry the branch of mathematics that studies the shape, size, and position of figures and the properties of space; also called 几何 jǐhé