Lu"nar (lū"nẽr), a. [L.
lunaris, fr. luna the moon. See Luna, and cf.
Lunary.] 1. Of or pertaining to the moon;
as, lunar observations.
2. Resembling the moon; orbed.
3. Measured by the revolutions of the moon;
as, a lunar month.
4. Influenced by the moon, as in growth,
character, or properties; as, lunar herbs.
Lunar caustic (Med. Chem.), silver
nitrate prepared to be used as a cautery; -- so named because silver
was called luna by the ancient alchemists. --
Lunar cycle. Same as Metonic cycle. See
under Cycle. -- Lunar distance, the
angular distance of the moon from the sun, a star, or a planet,
employed for determining longitude by the lunar method. -
- Lunar method, the method of finding a ship's
longitude by comparing the local time of taking (by means of a
sextant or circle) a given lunar distance, with the Greenwich time
corresponding to the same distance as ascertained from a nautical
almanac, the difference of these times being the longitude. --
Lunar month. See Month. --
Lunar observation, an observation of a lunar
distance by means of a sextant or circle, with the altitudes of the
bodies, and the time, for the purpose of computing the
longitude. -- Lunar tables.
(a) (Astron.) Tables of the moon's
motions, arranged for computing the moon's true place at any time
past or future. (b) (Navigation)
Tables for correcting an observed lunar distance on account of
refraction and parallax. -- Lunar year,
the period of twelve lunar months, or 354 days, 8 hours, 48
minutes, and 34.38 seconds.
Lu"nar, n. 1.
(Astron.) A lunar distance.
2. (Anat.) The middle bone of the
proximal series of the carpus; -- called also semilunar, and