ETYM Latin anomalia, Greek. Related to Anomalous.
Something that is anomalous; Astronomy the angle between a planet, the sun and the perihelion of the planet.
1. Deviation from the normal or common order or form or rule; SYN. anomalousness.
2. A person who is unusual; SYN. unusual person.
3. (Astronomy) Position of a planet as defined by its angular distance from its perihelion (as observed from the sun).