muraille

[Fr. muraille =a wall.] Her.: Walled, that is masoned and embattled. mür-al, *mür-all, a. & s. [Fr. mural , from Lat.mural is pertaining to a wall; murus =a wall; Sp. mural ; Ital. murale .] IMG:content-1490.jpg:[graphic] A. As adjective: 1. Of or pertaining to a wall. *2. Resembling a wall; perpendicular, steep. *B. As subst .: A wall. mural-arch, s. A wall or walled arch, placed exactly in the plane of the meridian line, for fixing a large quadrant, sextant, or other instrument, to ob serve the meridian altitudes, ., of the heavenly bodies. mural-circle, subst . An astronomical instrument consisting of a graduated circle, furnished with a telescope and firmly affixed to a wall, in the plane of the meridian. It is used for determining with great accuracy altitudes and zenith distances, from which may be found declinations and polar distances, and has a graduated circle secured at right angles to its horizontal axis. [TRANSIT.] Green wich Murak Circle.