pyrotechnic, pyrotechny, technetium, technic, technical, technique, technocracy, technophile, technophobe

telecommute, teleconference, telegram, telegraph, telekinesis, telemeter, telepathy, telephone, telephonic, telephoto, teleport, teleportation, teleprompter, teletype, television

tercentenary

terabyte, teratogenic, teratoma

tetracycline, tetrahedral, tetrahedron

thalassemia, Panthalassa, thalassophobia, thalassocracy, thalassotherapy

thanatism, thanatology, thanatos

theocentric

megatherium

thermocline, thermocouple, thermodynamic, thermograph, thermography, thermonuclear, thermoplastic, thermosphere, thermostat

thrombophlebitis, thrombus, thrombosis, thrombocytopenia

trance, transact, transaction, transcend, transcontinental, transcribe, transducer, transect, transept, transfer, transfigure

triangle, triathlon, triaxial, tricentennial, triceps, tricuspid, tricycle, trident, triennial, trifecta, trifid, trifocals, trigeminal, triglyceride

trophoblast, trophozoite

turbine, turbocharger, turbocharge

twist, twice