• Subglacial

    Full definition of subglacial

    Adjective

    subglacial

    1. Formed, or occurring beneath a glacier or other body of ice
      • 1836 Edward Charlesworth - The Magazine of Natural HistoryIt is also this melting beneath the ice (subglacial, suppose we call it) which loosens the ice from the ground, . . .
    © Wiktionary