Meaning of isopycnic

i•so•pyc•nic

Pronunciation: (ī"su-pik'nik), [key]
— adj.
  1. having the same density.
—n.
  1. a line drawn on a map connecting all points having the same density, as of water or air.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.