An aromatic hydrocarbon (as benzene or naphthalene).

ETYM Latin amphitheatrum, from Greek; amphi + theatron theater: cf. French amphithéâtre. Related to Theater.
1. A oval large stadium with tiers of seats; an arena in which contests and spectacles are held; SYN. amphitheatre, coliseum. /> 2. A sloping gallery with seats for spectators (as in an operating room or theater); SYN. amphitheatre.
Large oval or circular building used by the Romans for gladiatorial contests, fights of wild animals, and other similar events. It is an open structure with a central arena surrounded by rising rows of seats. The Colosseum in Rome, completed AD 80, held 50,000 spectators.

See

ETYM Latin arena, harena, sand, a sandy place.
1. The central area of an ancient Roman amphitheater where contests and spectacles were held; especially a sand-strewn area.
2. Where sports events take place; SYN. scene of action.

ETYM as. hring, hrinc; akin to Fries. hring, Dutch and German ring, Old High Germ. ring, hring, Icel. hringr, DAn. and sw. ring; cf. Russ. krug. Related to Harangue, Rank a row,Rink.
(Homonym: wring).
1. A circular band of a precious metal worn on the finger; SYN. band.
2. One of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises.
3. Anything having a circular shape; SYN. halo, annulus, anulus, doughnut, anchor ring.
4. The sound of a bell ringing; SYN. ringing, tintinnabulation.
5. A characteristic sound.
Circlet, usually of precious metal, sometimes set with gems, worn on a finger as a decoration or token. The origin of the wedding ring is uncertain, but betrothal rings were bestowed in Roman times. Rings were used for money in ancient Egypt and elsewhere. Their connection with the church still survives in instances such as the English coronation.

1. An enclosure for cockfights.
2. Where the driver sits while driving the racing car.
3. Where the pilot sits while flying the aircraft.

A stadium where bullfights take place.
1. An arena for bullfights
2, A short oval track for horse or auto racing

Any of a group of medium-sized, RNA-containing enveloped viruses that appear grainy under the electron microscope. The group includes the Lassa fever virus.
arenovirus, arenavirus.