ell: το όγδοον του κύκλου

Information
has URI	http://lexvo.org/id/term/ell/%CF%84%CE%BF%20%CF%8C%CE%B3%CE%B4%CE%BF%CE%BF%CE%BD%20%CF%84%CE%BF%CF%85%20%CE%BA%CF%8D%CE%BA%CE%BB%CE%BF%CF%85

Meaning
means	(noun) a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration octant