geosyncline

== English == === Etymology === Back-formation from geosynclinal. === Pronunciation === (UK) IPA(key): /dʒiːəʊˈsɪŋklʌɪn/ === Noun === geosyncline (plural geosynclines) (geology) A large, linear depression in the Earth's crust in which sediment accumulates. ==== Derived terms ====