Cas may be

• Calcium sulfide, the chemical compound with the formula CaS
• Cas (people), an ancient people
• Cassiopeia (constellation), standard astronomical abbreviation
• Cas, an acid tasting type of guava that grows in Costa Rica, psidium friedrichsthalium.
• Caş - A type of cheese made in Romania.

Calcium sulfide is the chemical compound with the formula CaS. This white material crystallizes in cubes, with the rock salt structure. ... The Cas or Caspi were a tribe of the Dahae who settled south of the Caspian sea and north of the Alborz mountains, in what is now the Gīlān Province, in Achaemenid times. ... Cassiopeia (IPA: ) is a northern constellation which Greek mythology considered to represent a vain queen who boasted about her unrivaled beauty. ... Species About 100 species, see text. ... This is telemea before, or just after beeing salted. ...

See also

• CAS

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