| TCA | Total Constituent Analysis | - | Computer Acronyms(common) |
| TCA | Traveling-cluster Approximation (a Generalization Of CPA For Electronic-structure Of Alloys) | - | Computer Acronyms(common) |
| TCA | Trichloroacetic Acid | - | Computer Acronyms(common) |
| TCA | Turbulent Contact Absorber | - | Computer Acronyms(common) |
| TCA | Thrust Chamber Assembly | - | Organizations |
| TCA | Time Of Closest Approach | - | Organizations |
| TCA | Translation Controller Assembly | - | Organizations |
| TCA | Transformational Communications Architecture -Turks And Caicos (ISO 3166 Trigram) | - | Astronomy |
