isobarometric,a.rare.|ˌaɪsəʊbærəʊˈmɛtrɪk| [f. iso- + barometric. (In mod.F. isobarométrique.)] = isobaric. 1864in Webster.1869E. A. Parkes Pract. Hygiene (ed. 3) 445 The isobarometric lines..connecting places with the same mean annual height of barometer.