sympiesometer noun. [,sɪmpɪɪ'sɒmɪtǝ] Now rare or obsolete. E19.
[Irreg. from Greek sumpiesis compression, from sumpiezein compress, formed as SYM- + piezein to press: see -OMETER.]
A barometer in which there is gas above the column of liquid in the tube, so that the pressure of the atmosphere acts against the pressure of both the liquid and the gas, a thermometer being attached for correction of the readings.

[TahlilGaran] English Dictionary ▲