Index of letter T
| -t | See -ed2 |
| tach(o)- | Speed. |
| tachy- | Rapid. |
| -tactic | See -taxis |
| taeni- | Ribbon; tapeworm. |
| talo- | The ankle bone. |
| -tard | A derogatory term for a stupid or annoying person. |
| tarso- | The tarsus. |
| -tastic | Something outstanding, superb, or excellent. |
| tauro- | Ox or bull. |
| tauto- | The same. |
| taxi- | See taxo- |
| -taxis | Arrangement or order; movement in response to an external stimulus. |
| taxo- | Order, arrangement, classification. |
| -taxy | See -taxis |
| tebi- | see the entry Words for multiples. |
| -technics | A technology or skill. |
| techno- | Technology, especially its impact or implications. |
| tectono- | Tectonics. |
| -teen | Forming the names of numerals from 13 to 19. |
| tele- | To or at a distance. |
| teleo- | Perfect; complete. |
| tellur(o)- | Tellurium; the earth. |
| telo- | End; purpose. |
| temporo- | The temporal bones. |
| tendino- | See teno- |
| -tene | Stages in cell division. |
| teno- | A tendon. |
| tephr(o)- | Ash; ash-coloured. |
| ter- | Three; having three. |
| tera- | In units of measurement, a factor of 1012, a million million. |
| terato- | Monsters or abnormal forms. |
| -teria | A self-service establishment. |
| tetan(o)- | Tetanus. |
| tetr(a)- | Four; having four. |
| -th1 | Forming ordinal and fractional numbers. |
| -th2 | Forming nouns. |
| thalam(o)- | The thalamus. |
| thalasso- | The sea. |
| thall(o)- | A thallus; thallium. |
| thanato- | Death. |
| thaumato- | Wonder or miracle. |
| -thelium | A layer of body tissue. |
| theo- | God or deities. |
| -theria | See -therium |
| theri(o)- | An animal. |
| -therium | An animal genus. |
| -therm | Temperature; heat. |
| therm(o)- | Heat; temperature. |
| -thermy | See -therm |
| thio- | Sulphur |
| -thon | See -athon |
| thorac(o)- | The chest or thorax. |
| thrombo- | Blood clotting. |
| -thymia | A condition of the mind. |
| thym(o)- | The thymus. |
| thyro- | The thyroid. |
| tibio- | The tibia. |
| -tic | See -atic, -etic, -ic, -itic, and -otic |
| -tide | A festival of the Christian Church; a specified time or season. |
| -tion | See -ion |
| -tious | See -itious |
| titano-1 | Gigantic, huge. |
| titano-2 | Titanium. |
| toco- | Childbirth; reproduction. |
| -tome | An instrument for cutting; a section or segment. |
| -tomy | Cutting. |
| -tonia | Muscle tone or tension; a personality state. |
| tono- | tension; tone. |
| -topia | A place with specified characteristics. |
| topo- | Place; position. |
| -tor | See -or1 |
| -tory | See -ory1 and -ory2. |
| tox(i)- | Toxin; toxic. |
| trache(o)- | The trachea. |
| trans- | Across; beyond; through. |
| tri- | Three; having three. |
| trib(o)- | Friction. |
| -trice | See -trix |
| tricho- | Hair. |
| -trichous | Hairy; having hair. |
| -triene | See -ene1 |
| trito- | Third. |
| -trix | Forming feminine agent nouns. |
| trocho- | Wheel-like. |
| -tron | A subatomic particle; an instrument or device. |
| -trope | Form; type; affinity. |
| -trophic | Nutrition; feeding. |
| troph(o)- | Nourishment. |
| -tropic | Turning; changing; affecting. |
| -tropism | Preferential growth or movement of an organism. |
| tropo- | Turning; change. |
| -tropous | See -tropic |
| -tropy | Forming nouns that correspond to adjectives in -tropic. |
| tubo- | A tube. |
| -tude | Forming abstract nouns. |
| turbo- | A turbine. |
| Turco- | Turkish; Turkish and … |
| -ty1 | Forming nouns. |
| -ty2 | Groups of ten. |
| tympan(o)- | The eardrum. |
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