from The Century Dictionary and Cyclopedia

  • n. As much of a volcano as remains after the formation of a caldera, whose rim is like a ring.
  • n. One of the large crater-like formations on the moon, inferior in size to the bulwark plains.


Sorry, no etymologies found.


  • Very many radiate from a large ring-mountain called Tycho, in the southern hemisphere; and one of them extends, with some breaks, nearly three thousand miles, passing northward over the Sea of Serenity and finally disappearing on the moon's north-western edge, or 'limb,' as it is termed.

    To Mars via The Moon An Astronomical Story

  • Owing to its size, brightness, and isolated position, this splendid ring-mountain can be seen from the earth without the aid of a glass; but even a field-glass will reveal much in this and similar formations which cannot be detected by the unaided eye.

    To Mars via The Moon An Astronomical Story

  • I drew their attention to Proclus -- a ring-mountain on the eastern side of this sea -- which is about eighteen miles in diameter, and the second brightest of the lunar formations.

    To Mars via The Moon An Astronomical Story

  • The view is a typical one, showing numerous craters and cracks, and a small ring-mountain with terracing.

    To Mars via The Moon An Astronomical Story

  • She saw the jagged peaks nearby and the crenelated ring-mountain wall, miles off to one side, and the smooth frozen lava of the "sea."

    Operation: Outer Space

  • It was a picture of a crater, a ring-mountain, the scene of the impact of something terrible and huge.

    Long Ago, Far Away

  • The ring-mountain there is largely worn away, but it was many miles across.

    Long Ago, Far Away

  • Van Ertborn in 1876; [859] while an object near the northern horn of the crescent, strongly resembling a lunar ring-mountain, was delineated both by De Vico in 1841 and by Denning forty years later.

    A Popular History of Astronomy During the Nineteenth Century Fourth Edition

  • On the east the travellers could easily see the ring-mountain _Condamine_, about 4000 feet high, while a little ahead on the right they could plainly distinguish _Fontenelle_ with an altitude nearly twice as great.

    All Around the Moon


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