euclidean(a = adj.pert) euclidian - relating to geometry as developed by Euclid; "Euclidian geometry"
Derived form noun euclid₁

euclidean, adj. of or relating to Euclid, 3rd-c. BC Alexandrian geometrician, esp. the system of geometry based on his principles.

Idiom:
Euclidean space space for which Euclidean geometry is valid.

Etymology:
L Euclideus f. Gk Eukleideios

euclidean geometry, euclidean space