DEWAR VESSEL n.
ssel for holding liquid air, etc., having the space between the walls exhausted so as to prevent conduction of heat, and sometimes having the glass silvered to prevent absorption of radiant heat; -- called also, according to the particular shape, Dewar bulb, Dewar tube, etc.
DIACRITIC; DIACRITICAL a.
a, â, ä, o, ô, etc. "Diacritical points." Sir W. Jones. A glance at this typography will reveal great difficulties, which diacritical marks necessarily throw in the way of both printer and writer. A. J. Ellis.