Arecibo observatory
a radio-astronomy and ionospheric observatory near Arecibo, Puerto Rico: site of one of the world’s largest single-dish radio telescopes, 1000 feet (305 meters) in diameter.
noun
an observatory in Puerto Rico at which the world’s largest dish radio telescope (diameter 305 m) is situated. It is operated by the National Astronomy and Ionosphere Center
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a toxic alkaloid obtained from the seeds of the , used chiefly in veterinary medicine as an agent for killing and expelling intestinal worms. Historical Examples arecoline is an oil, and the physiological action of the betel nut is alone due to this substance. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 6 Various
- Areflexia
areflexia areflexia a·re·flex·i·a (ā’rĭ-flěk’sē-ə) n. The absence of reflexes.
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noun a plural of erg2
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unconcerned with or indifferent to matters. adjective not practicing a religion; indifferent to or uninfluenced by a religion Examples The US advocates an areligious education.
- Arena chapel
a private chapel in Padua containing a fresco cycle painted (1305–06) by Giotto. Historical Examples Giotto represents this vice under the same symbol; but it is the weakest of all the figures in the Arena Chapel. The Stones of Venice, Volume II (of 3), John Ruskin The Arena Chapel stands apart, and is approached, at […]