The term isometric comes from the Greek for "having equal measurement" and is a descriptive word associated with several topics:

• Isometric projection, a method for the visual representation of three-dimensional objects in two dimensions, is a form of orthographic projection, or more specifically, an axonometric projection.

• Isometric exercise is a form of resistance exercise in which one's muscles are used in opposition with other muscle groups, to increase strength, for bodybuilding, physical fitness , or strength training. Isometric exercise was popularised by Charles Atlas (Angelo Siciliano).

• Isometre, a rhythmic technique in music.

• In mathematics an isometry is a distance preserving function