ASTATIC a.
Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction. Astatic pair (Magnetism), a pair of magnetic needles so mounted as to be nearly or quite astatic, as in some galvanomet…
ATHWART prep. 2 definitions
Across the direction or course of; as, a fleet standing athwart our course. Athwart hawse, across the stem of another vessel, whether in contact or at a small distance. -- Athwart ships, across the ship from side to side, or in that direction; -- opposed to fore and aft.
ATMOSPHERIC; ATMOSPHERICAL a.
eric pressure, the pressure exerted by the atmosphere, not merely downwards, but in every direction. In amounts to about 14.7 Ibs. on each square inch. -- Atmospheric railway, one in which pneumatic power, obtained from compressed air or the creation of a vacuum, is the propelling force. -- Atmospheric tides. See und…