atoll

n ring-shaped coral reef enclosing a lagoon 环状珊瑚岛; 环礁.

ate, atelier, atheism, atheist, atheistic, Athelney, Athens, athlete, athlete's foot, athletic, athletics, athwart, atishoo, Atlanta, Atlantic, atlas, atmosphere, atmospheric, atmospheric pressure, atmospherics, atom, atom bomb, atomic, atomic bomb (also A-bomb, atom bomb), atomic energy, atomic number, atomic pile, atomize, atomise, atomizer, -iser, atonal, atonality, atone, atonement, atop, atrocious, atrociously, atrociousness, atrocity, atrophy, attach,