isometric (Adjective) — (mathematics) related by an isometry.
isometric (Adjective) — (physiology) of or involving muscular contraction in which tension increases while length remains constant.
isometric (Adjective) — Having equal dimensions or measurements.
isometric (Adjective) — (crystallography) of a crystal system characterized by three equal axes at right angles.
isometric (Noun) — A line connecting isometric points.