n.; pl. E. Arenas L. Arenæ [ L. arena, harena, sand, a sandy place. ] 1. (Rom. Antiq.) The area in the central part of an amphitheater, in which the gladiators fought and other shows were exhibited; -- so called because it was covered with sand. [ 1913 Webster ]

2. Any place of public contest or exertion; any sphere of action; as, the arenaof debate; the arena of life. [ 1913 Webster ]

3. (Med.) “Sand” or “gravel” in the kidneys. [ 1913 Webster ]

a. [ L. arenaceus, fr. arena sand. ] Sandy or consisting largely of sand; of the nature of sand; easily disintegrating into sand; friable; as, arenaceous limestone. [ 1913 Webster ]

a. [ L. arenarius, fr. arena sand. ] Sandy; as, arenarious soil. [ 1913 Webster ]

n. [ L. arenatio, fr. arena sand. ] (Med.) A sand bath; application of hot sand to the body. Dunglison. [ 1913 Webster ]

‖n. [ LL. arendator, arrendator, fr. arendare, arrendare, to pay rent, fr. arenda yearly rent; ad + renda, F. rente, E. rent. Cf. Arrentation and Rent. ] In some provinces of Russia, one who farms the rents or revenues. [ 1913 Webster ]

☞ A person who rents an estate belonging to the crown is called crown arendator. Tooke. [ 1913 Webster ]

‖‖ n. [ Malayan. ] A palm tree (Saguerus saccharifer) which furnishes sago, wine, and fibers for ropes; the gomuti palm. [ 1913 Webster ]

n. [ L. arena sand + colere to cherish or live. ] (Paleon.) An ancient wormhole in sand, preserved in the rocks. Dana. [ 1913 Webster ]

adj. 1. growing or living or burrowing in sand. arenicolous worms [ WordNet 1.5 ]

a. [ L. arena sand + Gr. li`qos stone. ] Of or pertaining to sandstone; as, arenilitic mountains. Kirwan. [ 1913 Webster ]

a. [ L. arenosus, fr. arena sand. ] Sandy; full of sand. Johnson. [ 1913 Webster ]