Meaning of thalassography

thal•as•sog•ra•phy

Pronunciation: (thal"u-sog'ru-fē), [key]
— n.
  1. oceanography, esp. that branch dealing with smaller bodies of water, as bays, sounds, and gulfs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.