REFRACTION n.
with a graduated circle for the measurement of refraction. -- Refraction of latitude, longitude, declination, right ascension, etc., the change in the apparent latitude, longitude, etc., of a heavenly body, due to the effect of atmospheric refraction. -- Terrestrial refraction, the change in the apparent altitude of…
RHACHIGLOSSA n.
A division of marine gastropods having a retractile proboscis and three longitudinal rows of teeth on the radula. It includes many of the large ornamental shells, as the miters, murices, olives, purpuras, volutes, and whelks. See Illust. in Append.
RIGHT a.
), sailing on one of the four cardinal points, so as to alter a ship's latitude or its longitude, but not both. Ham. Nav. Encyc. -- Right sphere (Astron. & Geol.), a sphere in such a position that the equator cuts the horizon at right angles; in spherical projections, that position of the sphere in which the primitive…