In geometry, a right line passing through the centre of any circular figure from one point of its circumference to another.
·noun A diametral plane. II. Diameter ·noun The length of a straight line through the center of an ...
Webster's Dictionary of the English Language
The angle which the diameter of a heavenly body subtends at any time, varying inversely with its dis...
The Sailor's Word-Book
The angle subtended by half the diameter of a heavenly body; in the cases of the sun and moon it is ...
The increase of her apparent diameter occasioned by an increase of altitude: or that which is due to...