Nouns

• arbovirus — Noun – English ～ a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis
• arbutus — Noun – English ～ any of several evergreen shrubs of the genus Arbutus of temperate Europe and America
• arc — Noun – English ～ a continuous portion of a circle
• arc — Noun – English ～ electrical conduction through a gas in an applied electric field
• arc — Noun – English ～ something curved in shape
• arca — Noun – English ～ type genus of the family Arcidae: ark shells and blood clams
• amusement arcade — Noun – English ～ an arcade featuring coin-operated game machines
• arcade — Noun – English ～ a structure composed of a series of arches supported by columns
• arcade — Noun – English ～ a covered passageway with shops and stalls on either side
• arcadia — Noun – English ～ a department of Greece in the central Peloponnese
• Arcadian — Noun – English ～ an inhabitant of Arcadia
• Arcadic — Noun – English ～ the dialect of Ancient Greek spoken by Arcadians
• arcanum — Noun – English ～ information known only to a special group; "the secret of Cajun cooking"
• arccos — Noun – English ～ the inverse function of the cosine; the angle that has a cosine equal to a given number
• arccosecant — Noun – English ～ the angle that has a cosecant equal to a given number
• arccosine — Noun – English ～ the inverse function of the cosine; the angle that has a cosine equal to a given number
• arccotangent — Noun – English ～ the inverse function of the cotangent; the angle that has a cotangent equal to a given number
• arcdegree — Noun – English ～ a measure for arcs and angles; "there are 360 degrees in a circle"
• arcella — Noun – English ～ an amoeba-like protozoan with a chitinous shell resembling an umbrella
• Arcellidae — Noun – English ～ soil and freshwater protozoa; cosmopolitan in distribution

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