| Acronym | Definition |
|---|
| ECL | Ecolab, Inc. (stock symbol) |
| ECL | Embeddable Common-Lisp |
| ECL | Execution Control List |
| ECL | Enterochromaffin-Like Cells |
| ECL | European Consortium for the Certificate of Attainment in Modern Languages |
| ECL | Existing Chemicals List |
| ECL | European Cyber League |
| ECL | Executive Control Language |
| ECL | Energy Conservation Loan Program (Connecticut) |
| ECL | European Combat League (gaming) |
| ECL | École, Collège, Lycée (French: School, College, High School) |
| ECL | Esterel-C Language (project) |
| ECL | Equipment Component List |
| ECL | Environmental Chemical Laboratory |
| ECL | East Coast LAN (gaming organization) |
| ECL | Electric Control Loading |
| ECL | Effective Code Length |
| ECL | Engine Condition Lever |
| ECL | Executive Command Level |
| ECL | Euro Cable Labs |
| ECL | Emergency Cooling Limits |
| ECL | Electronic Communication Language |
| ECL | Economic Conformance Level |
| ECL | Extra Credit Library |
| ECL | Equipment Control List |
| ECL | External Countermeasure Launcher |
| ECL | Engineering Change Letter |
| ECL | Ecole de Cadres de Lausanne (Switzerland) |
| ECL | European Community Law |
| ECL | Association of European Cancer Leagues (Brussels, Belgium) |
| ECL | Ecole Centrale de Lyon (French: Central School of Lyon; France) |
| ECL | External Cavity Laser |
| ECL | Expanded Content Label |
| ECL | European Cancer League |
| ECL | E-Caprolactone (chemistry) |
| ECL | European Champions League (soccer) |
| ECL | EMW Capability List (EMW = Expeditionary Maneuver Warfare) |
| ECL | Environmental Conservation Law (New York) |
| ECL | English Comprehension Level |
| ECL | Emitter-Coupled Logic |
| ECL | Electrochemiluminescence |
| ECL | Exit Control List (Pakistan) |
| ECL | Enhanced Chemiluminescence |
| ECL | Eastern Coalfields Limited (India) |
| ECL | Equity Commitment Letter |
| ECL | English and Comparative Literature |
| ECL | Equity Credit Line (finance) |
| ECL | Effective Character Level (Dungeons & Dragons gaming) |
| ECL | Early Childhood Learning (various locations) |
| ECL | Express Couriers Limited (New Zealand) |
| ECL | Energy Conservation Law (various locations) |
| ECL | Electronic Cash Letter (banking and finance) |
| ECL | East Coast Low |
| ECL | Evangelism to Communist Lands |
| ECL | End of Custody Licence (UK) |
| ECL | Engine Control Lever |
| ECL | Export Control List (Canada Border Services Agency) |