
1) Arcadian mythology 2) Offspring of Zeus 3) Son of Zeus and Callisto
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https://www.crosswordclues.com/clue/arcas

In Greek mythology, Arcas (s; Ἀρκάς) was the son of Zeus and Callisto. Callisto was a nymph in the retinue of the goddess Artemis. Zeus, being a flirtatious god, wanted Callisto for a lover. As she would not be with anyone but Artemis, Zeus cunningly disguised himself as Artemis and seduced Callisto. The child resulting from their union was ...
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http://en.wikipedia.org/wiki/Arcas
[butterfly] Arcas is a genus of butterfly in the family Lycaenidae. The members (species) of this genus are found in the Neotropic ecozone. The genus was erected by William John Swainson in 1832. The sister genus of Arcas is Theritas. Bálint, Zs., 2006 Arcas Swainson, 1832 is revisited: review of some species-group names, identification of...
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http://en.wikipedia.org/wiki/Arcas_(butterfly)
[crater] Arcas is a crater on Jupiter`s moon Callisto measuring 60 km across. This an example of a central pit impact crater. A smaller crater near Arcas is called Ginandy. The crater is named after Arcas, the son of Callisto in Greek mythology. ...
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http://en.wikipedia.org/wiki/Arcas_(crater)
[rocket] Arcas — also designated ARCAS — was the designation of an American sounding rocket, which was launched between July 31, 1959 and August 9, 1991 at least 421 times. The Arcas has a maximum flight altitude of 52 kilometers, a takeoff thrust of 1.5 kN, a takeoff weight of 34 kilograms, and a diameter of 11 centimeters. The Arcas w...
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http://en.wikipedia.org/wiki/Arcas_(rocket)

Arcas was an American small single-stage solid-propellant rocket vehicle that was used primarily to gather meteorological data at an altitude of 65 km during the 1960's. Arcas was 234 cm long and had a diameter of 11 cm.
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http://www.probertencyclopaedia.com/browse/IA.HTM

The red grape variety is a new variety between Cabernet Sauvignon x Băbească Neagră. It was crossed in Romania in 1985 by the private breeders D. Danulescu, E. Negulescu, G. Sandu-Ville and P. Virna. It is used as a wine grape. In 2016 a vineyard area of just under one hectare was designated (Kym Anderson).
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https://glossary.wein.plus/arcas

a son of Zeus and Callisto, the ancestor of the Arcadians who was set among the stars with his mother as the Little Bear and the Great Bear respectively.
Found on
https://www.infoplease.com/dictionary/arcas
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