isoarca

[Pref. iso- =equal, and Lat. arc a (q.v.).] Palæont .: A genus of Arcade. Fourteen species are known, from the Lower Silurian to the Chalk. i-şo-bar', ti-so-bäre', s . [Pref. iso- , and Greek baros =weight.] Phys. Geog. & Meteor . (pl.): Lines connecting places which have the same mean barometric pre Three modifications of them exist: those ure. connecting places which have equal pre ure in January, those which po e it in July, and those in which it exists during the whole year. The closer the isobars are the stronger the wind, the further apart the lighter the wind.