from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fixed compass card on which bearings relative to a ship's heading are taken.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A device used to take a bearing on a distant object.
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument similar to a mariner's compass, but without magnetic needles, and having two sight vanes by which bearings are taken, esp. such as cannot be taken by the compass.
from The Century Dictionary and Cyclopedia
- n. Nautical, an instrument for detecting errors of the compass by the bearings of celestial objects.
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
Named from Pelorus, reportedly the name of Hannibal's pilot. (Wiktionary)