I1S1A1R1I1T1H4M3S1
14 points
ISARITHMS is validvalid
ISARITHM, an isopleth [n]
ISARITHM, a line on a map passing through places of the same density of population [n]
ISARITHM, an isopleth [n]
ISARITHM, a line on a map passing through places of the same density of population [n]