Usually means: Ephedrine, caffeine, and aspirin stack.
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We found 17 dictionaries that define the word ECA:

General (6 matching dictionaries)
  1. eca, eCa: Wordnik
  2. ECA, e.c.a: Dictionary.com
  3. ECA: Wikipedia, the Free Encyclopedia
  4. ECA: Stammtisch Beau Fleuve Acronyms
  5. eca: Longman Dictionary of Contemporary English
  6. ECA: Wiktionary

Business (4 matching dictionaries)
  1. MoneyGlossary.com (No longer online)
  2. ECA: Bloomberg Financial Glossary
  3. ECA: Financial dictionary
  4. Glossary of Trade and Shipping Terms (No longer online)

Medicine (1 matching dictionary)
  1. PERFUSION TECHNOLOGY, OPEN HEART SURGERY AND CARDIOLOGY (No longer online)

Miscellaneous (3 matching dictionaries)
  1. CIA World Factbook (No longer online)
  2. ECA: Acronym Finder
  3. AbbreviationZ (No longer online)

Science (1 matching dictionary)
  1. ECA: Cytokines & Cells Online Pathfinder Encyclopaedia

Slang (1 matching dictionary)
  1. ECA: Urban Dictionary

Tech (1 matching dictionary)
  1. AUTOMOTIVE TERMS (No longer online)

Definitions from Wiktionary (ECA)

noun:  (nautical) Initialism of emission control area.
noun:  (education) Initialism of early career academic.
noun:  (anatomy) Initialism of external carotid artery. [(anatomy) The outer branch of the carotid artery that supplies the face, tongue, and external parts of the head.]
noun:  Acronym of European Communist Action.

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