Origin of isochore
adjective Also i·so·met·ri·cal.
Origin of isometric
adjective Also: isometrical
Word Origin for isometric
1838, literally "of the same measure," coined from Greek isos "equal" (see iso-) + metron "measure" (see meter (n.2)). Originally a method of using perspective in drawing; the physiological sense relating to muscular action is from 1891, from German isometrisch in this sense (1882).