SINCE 1828
isabnormal
noun
is·abnormal
| \ ¦īs also ¦īz+\
variants:
or isoabnormal \ ¦ī(ˌ)sō also -)zō+ \
Definition of isabnormal
: an imaginary line or a line on a chart that connects or marks places on the surface of the earth having equal differences in a given time from the normal temperature of these places or that indicates differences between the calculated and actual temperatures of the different parallels of latitude
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