Deca, Decas or DECA may refer to:

• Deca-, a metric prefix
• Nandrolone, the active ingredient in the steroid Deca-Durabolin, commonly referred to as Deca
• Decabromodiphenyl ether, an organic compound
• Deca-press, Moldavian news agency
• Deca (journalism collective), a journalism cooperative
• Deca i Sunce (Children and the Sun), album by the Serbian hip-hop artist Marčelo
• Deca Sports, sports video game series for the Wii
• Decas (album), compilation album by the American metal band As I Lay Dying
• DECA Games, video game company

Look up deca in Wiktionary, the free dictionary.

• DECA (organization), a business-marketing student organization, formerly Distributive Education Clubs of America
• Defense Commissary Agency, United States Department of Defense
• Defence Electronics and Components Agency, United Kingdom Ministry of Defence
• DECA, an abbreviation for the Decathlon or Super Decathlon light aircraft by Champion Aircraft Corporation

• Deka (disambiguation)
• Decca (disambiguation)
• Dalton (disambiguation)

This disambiguation page lists articles associated with the title Deca.
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