| Taxidermy |
Art of curing and stuffing animals |
| Tectonics |
Science of structure of objects, buildings and landforms |
| Tegestology |
Study and collecting of beer mats |
| Teleology |
Study of final causes; analysis in terms of purpose |
| Telmatology |
Study of swamps |
| Teratology |
Study of monsters, freaks, abnormal growths or malformations |
| Teuthology |
Study of cephalopods |
| Textology |
Study of the production of texts |
| Thalassography |
Science of the sea |
| Thanatology |
Study of death and its customs |
| Thaumatology |
Study of miracles |
| Theology |
Study of religion; religious doctrine |
| Theriatrics |
Veterinary medicine |
| Theriogenology |
Study of animals' reproductive systems |
| Thermodynamics |
Study of relation of heat to motion |
| Thermokinematics |
Study of motion of heat |
| Thermology |
Study of heat |
| Therology |
Study of wild mammals |
| Thremmatology |
Science of breeding domestic animals and plants |
| Threpsology |
Science of nutrition |
| Tidology |
Study of tides |
| Timbrology |
Study of postage stamps |
| Tocology |
Obstetrics; midwifery |
| Tonetics |
Study of pronunciation |
| Topology |
Study of places and their natural features |
| Toponymics |
Study of place-names |
| Toreutics |
Study of artistic work in metal |
| Toxicology |
Study of poisons |
| Toxophily |
Love of archery; archery; study of archery |
| Traumatology |
Study of wounds and their effects |
| Tribology |
Study of friction and wear between surfaces |
| Trichology |
Study of hair and its disorders |
| Trophology |
Study of nutrition |
| Tsiganology |
Study of gypsies |
| Turnery |
Art of turning in a lathe |
| Typhlology |
Study of blindness and the blind |
| Typography |
Art of printing or using type |
| Typology |
Study of types of things |