seafloor spreading

Noun

 * 1)  The outward movement of the seafloor from central underwater ridges as a result of plate tectonics; the major cause of continental drift.

Translations

 * Danish: oceanbundsspredning
 * French: expansion des fonds océaniques
 * German: Ozeanbodenspreizung
 * Norwegian:
 * Bokmål: havbunnsspredning
 * Nynorsk: havbotnspreiing
 * Swedish:, oceanbottenspridning