Answer: euclidean

AnswerCrossword Clue
EUCLIDEANType of geometry
EUCLIDEANLike geometry in which parallel lines never intersect
euclideanOf or relating to Euclid, in particular
euclideanOf such a nature that the postulates of this system of geometry are valid
euclideanOf or denoting the system of geometry based on the work of Euclid and corresponding to the geometry of ordinary experience
euclideanrelated to Euclid, or to the geometry of Euclid also EUCLIDIAN