Iso (iso-) is a prefix indicating similarity or equality. It comes from the Greek ίσος, meaning "equal."

Examples of words using iso :

• Isotherm (line of equal temperature)
• Isobar (line of equal pressure)
• Isocline (line of equal magnetic declination in the earth's magnetic field)
• Isohyet
• Isohypse (line of equal groundwater head)
• Isotope
• Isoelectronic
• Isometric
• Isomer (molecules with the same chemical formula but arranged differently)

See also: contour line

---

ISO or Iso is the short name, not an acronym, of the International Organization for Standardization (also sometimes known informally and unofficially as the International Standards Organization).

---

The ISO number is a measure of film speed (photographic film sensitivity to light).

---

ISO is also the short name, not an acronym, of the International Sugar Organization.

---

In the United States electric generation and transmission industry an ISO is an Independent System Operator.

---

In Information technology ISO ( or file extension .iso) is an ISO 9660 image of a file system.

---

Iso automobile - an Italian automobile manufacturer, developer of the Isetta bubble car and various sports cars.

sl:izo