oceanography

noun

Etymology: Etymology tree English ocean Proto-Indo-European *gerbʰ- Proto-Hellenic *grə́pʰō Ancient Greek γρᾰ́φω (grắphō) Ancient Greek -ᾱ (-ā) Ancient Greek -η (-ē) Ancient Greek γραφή (graphḗ) Ancient Greek -γραφίᾱ (-graphíā)bor. French -graphieder. English -ography English oceanography From ocean + -ography.

1. The exploration and scientific study of the oceans and ocean floor.