| Acronym | Definition |
|---|
| ETCA➣East Texas Christian Academy (Tyler, TX) |
| ETCA➣Education & Training Course Announcements |
| ETCA➣East Tennessee College Alliance |
| ETCA➣European Tour Caddies Association (Surrey, England) |
| ETCA➣Emergency Terrain Clearance Altitude |
| ETCA➣Exchange-Type Chromosome Aberrations (nuclear physics) |