A small part, division, or portion of a whole. A unit of shadow length, usually a twelfth part of a full shadow scale as commonly found on the…
Astronomy. One twelfth of the diameter of the sun or moon, used esp. as a unit to express the magnitude of an eclipse; = digit, n. 2. Now historical.
Astronomy. = point, n.1 6d. Obsolete.
A twelfth part of the solar or lunar diameter, by which the degree of obscuration in an eclipse was expressed; = point, n.1 6d.
Astronomy. One twelfth of the diameter of the sun or moon, used esp. as a unit to express the magnitude of an eclipse.