Definition of back-arc in English:

back-arc

Line breaks: back-arc

adjective

Geology
  • Relating to or denoting the area behind an island arc: back-arc basin
    More example sentences
    • The Kinik rocks have characteristics of ophiolites formed in oceanic or back-arc basins rather than island-arc settings based on a number of observations.
    • Deformation is complex, with normal faulting and strike-slip faulting in the geomorphological back-arc basin.
    • What remains unclear is whether the rocks formed in an open ocean or a marginal back-arc basin associated with a subduction zone.

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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody