| TDT | Timeing Detection Table | 数据测定表 |
| TDT | thermal death time | 热力致死时间 |
| TDT | Terrestrial Dynamical Time | 地球动力学时间 |
| TDT | Tanda Tula, South Africa | 坦达图拉,南非 |
| TDT | Tucker- Davis Technologies | 塔克-戴维斯科技 |
| TDT | The Domino Theory (band) | 多米诺理论(乐队) |
| TDT | Timed Decision Table | 定时决策表 |
| TDT | Training Development Technician | 培训开发技术员 |
| TDT | Tooth Decay Test | 牙齿衰退试验 |
| TDT | Tactical Display Terminal | 战术显示终端 |
| TDT | Target Designator Transmitter | 目标指示器发射器 |
| TDT | TCW / DW Term Trust 2000 | TCW / DW术语信任2000年 |
| TDT | tumour doubling time | 肿瘤倍增时间 |
| TDT | tone decay test | 音调衰减试验 |
| TDT | TelevisiÓ Digital Terrestre | TelevisiÓ Digital Terrestre |
| TDT | Transparent Digital Transmodulator (telecommunications) | 透明数字Transmodulator(电信) |
| TDT | Terminal Deoxynucleotidyl Transferase (biochemistry) | 末端脱氧核苷酸转移酶(生物化学) |
| TDT | Timing with Dirty Templates Algorithm | 脏模板定时算法 |
| TDT | tentative discharge tomorrow | 明天暂定出院 |
| TDT | terminal deoxynucleotidyl transferase | 末端脱氧核苷酸转移酶 |
| TDT | Terrestrial Dynamical Time (obsolete form of TT) | 地球动力学时间(TT的过时形式) |
| TDT | Toronto Dance Theatre | 多伦多舞蹈剧院 |
| TDT | Tourist Development Tax | 旅游发展税 |
| TDT | Time Domain Transmission | 时域传输 |
| TDT | Thermal Decay Time | 热衰减时间 |
| TDT | Transonic Dynamics Tunnel | 跨声速动力学风洞 |
| TDT | Tredegar Development Trust (UK) | 卓德嘉发展信托(英国) |
| TDT | transmission disequilibrium test | 传递不平衡试验 |
| TDT | Total Decompression Time | 总减压时间 |
| TDT | Topic Detection and Tracking (datamining) | 主题检测和跟踪(数据挖掘) |
| TDT | TelevisiÓn Digital Terrestre (digital television type, Spain) | TelevisiÓn Digital Terrestre (digital television type, Spain) |
| TDT | Test Data Team | 测试数据团队 |
| TDT | Theater Display Terminal | 剧院显示终端 |