I1S1O1P3Y4C3N1I1C3
18 points
ISOPYCNIC is validvalid
a line on a map connecting points of equal atmospheric density, also ISOPYCNAL
a line on a map connecting points of equal atmospheric density, also ISOPYCNAL
a line on a map connecting points of equal atmospheric density, also ISOPYCNAL
a line on a map connecting points of equal atmospheric density, also ISOPYCNAL