(ˈ)īs also (ˈ)īz+ noun
Etymology: International Scientific Vocabulary is- + all- + -bar (as in isobar )
: an imaginary line or a line on a chart connecting the places of equal change of atmospheric pressure within a specified time
• is·al·lo·bar·ic (|)ī|salə|bärik, (|)ī|za-, -bar- adjective