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mid-ocean ridge

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WordReference Random House Unabridged Dictionary of American English © 2026

mid′-o•cean ridge′

Oceanographyany of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading.

1960–65

'mid-ocean ridge' also found in these entries (note: many are not synonyms or translations):

fracture zone - rift valley - transform fault

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