---

• n  a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)

• IQ
• I.Q.

News & Articles

---

• Researchers Link IQ to Width of Blood Vessels in the Retina
  Duke University researchers studying brain health have found a link between the width of blood vessels in the retina and intelligence quotient (IQ). Their findings could eventually have a significant impact on understanding dementia and other cognitive issues years before any deficits occur.
  June 5, 2013 - Yahoo! Contributor Network via Yahoo! News