barometer
ba.rom.e.ter or baro.met.ri.cal \b*-'ra:m-*t-*r\ \.bar-*-'me-trik\ \-tri-k*l\ \-tri-k(*-)le-\ \b*-'ra:m-*-tre-\ n 1: an instrument for determining the pressure of the atmosphere and hence f or assisting in judgment as to probable weather changes and for determining the height of an ascent 2: something that serves to register fluctuations (as in public opinion) - baro.met.ri.c aj