- An asteroid that orbits the sun in just over 365 days in a highly eccentric and inclined elliptical orbit that periodically brings it close to Earth. Earth has a strong gravitational influence on Cruithne, but the inclined orbit of the asteroid precludes a collision between the two bodies and also the possibility of Cruithne ever orbiting Earth as a second moon.
- used with a pl. verb The Picts.
Origin of CruithneOld Irish Cruithne the Picts ( the asteroid being named by Duncan Waldron, the Scottish amateur astronomer who discovered it in 1986 ) from Cruithen a Pict ; see kwer- in Indo-European roots.