楕円[daen] ellipse
楕円形[daenkei] elliptical shape
回転楕円体[kaitendaentai] spheroid
楕円関数[daenkansuu] elliptic function
超楕円関数[choudaenkansuu] hyperelliptic function

楕円銀河[daenginga] elliptical galaxy
楕円面[daenmen] ellipsoid
楕円体[daentai] ellipsoid body
楕円幾何学[daenkikagaku] elliptic geometry