whaleback Definition

mainmast, lightship, barque, prow, icefield, rock outcrop, syrtis major, peapod, cumulus cloud, crinoids, esker, stratovolcano, fossae, horsehead nebula, weddell sea, borealis, tufa, birchbark, magellanic, massifs, topsail, trifid, promontories, scows, longship, stromatolite, cragged, drumlin, lassen peak, millrace, gondwanaland, antarctic continent, boreas, ridge, planitia, stalactite, hummocks, dimetrodon, conodonts, wherry, tumulus, pallasite, concretion, carboniferous, caravel, sundog, dory, scutum, spitzbergen, duckbill, madrona, philae, crustal plate, ursa minor, eridanus, tussock grass, aeronaut, volcanic crater, bathyscaphe, bathyscaph, hillfort, purse seiner, limber pine, gritstone, diplodocus, skara brae, sea serpent, tallgrass, escarpments, totara, lyme grass, thimbleberry, verdigris, fjord, bathysphere, sargasso, chambered nautilus, microfossil, burls, bateau, evaporite, hudsonian, crenellations, mosasaur, moulins, hekla, vitus bering, bristlecone pine, hogback, glacial boulder, sextants, lochan, foremast, arctic archipelago, bellingshausen sea, ice shelf, ichthyosaur, floe, metamorphic rock, refugium,