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English Words Starting With T

7,190 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

thermic fever
nounVery Low
/ˈθɜːmɪk ˈfiːvə/An outdated or archaic term for a fever caused by exposure to high temperatures or heat stroke.
thermidor
nounC2
/ˈθɜː.mɪ.dɔː/A month in the French Republican calendar (mid-July to mid-August).
thermidorian
nounVery Low
/ˌθɜːmɪˈdɔːrɪən/Relating to or characteristic of a moderate reaction following a period of revolutionary upheaval, especially one that seeks to restore order and stability.
thermion
nounVery Low (C2)
/ˈθɜːmɪˌɒn/An electrically charged particle, especially an electron, emitted by a heated substance in thermionic emission.
thermionic current
nounRare / Very Low (C2+)
/ˌθɜːmaɪˈɒnɪk ˈkʌrənt/A flow of electrons emitted from a heated material, typically in a vacuum tube or similar device.
thermionic emission
nounC2 / Very Low Frequency
/ˌθɜː.miˌɒn.ɪk ɪˈmɪʃ.ən/The release of electrons from a heated material, typically a metal filament.
thermionic tube
nounC2 / Very Low Frequency
/ˌθɜː.miˈɒn.ɪk ˈtjuːb/A sealed glass container from which air has been removed, containing electrodes that control the flow of electrons for amplification, rectification, or switching in electronic circuits.
thermionic valve
nounVery Low
/ˌθɜː.miˈɒn.ɪk vælv/An electronic device that controls the flow of electrons in a vacuum using thermionic emission, historically used for amplification, rectification, and switching in electronic circuits.
thermionics
nounC2
/ˌθɜː.miˈɒn.ɪks/The branch of physics and technology that deals with the emission and behaviour of electrons in a vacuum or gas when heated (thermionic emission).
thermistor
nounLow
/θɜːˈmɪstə/A type of electrical resistor whose resistance varies significantly with temperature.
thermit
nounLow (Technical)
/ˈθɜː.maɪt/A chemical mixture of aluminum powder and a metal oxide (commonly iron oxide), which produces an extremely high-temperature exothermic reaction (aluminothermic reaction) when ignited. Used for welding and incendiary purposes.
thermite
nounLow
/ˈθɜːmaɪt/A highly energetic incendiary mixture of a metal powder (commonly aluminium) and a metal oxide (commonly iron oxide), which when ignited produces an exothermic oxidation-reduction reaction, generating intense heat.
thermite process
nounC1
/ˈθɜːmaɪt ˈprəʊses/A chemical reaction between a metal oxide and aluminium (or another reactive metal) that produces intense heat, used primarily in welding, metal cutting, and incendiary devices.
thermoacidophile
nounVery low
/ˌθɜːməʊˌæsɪdəʊˈfaɪl/An organism that thrives in extremely hot and acidic environments.
thermoammeter
nounVery Low
/ˌθɜːməʊˈæmɪtə/An instrument that measures electric current by utilising the heating effect of that current.
thermoanalysis
nounVery low
/ˌθɜː.məʊ.əˈnæl.ə.sɪs/A technique for studying the properties of materials as they change with temperature.
thermoanesthesia
nounVery Rare
/ˌθɜːməʊˌænɪsˈθiːziə/The loss of the ability to perceive temperature or heat.
thermobarograph
nounVery Low
/ˌθɜː.məʊˈbær.ə.ɡrɑːf/An instrument that simultaneously records temperature and atmospheric pressure.
thermobarometer
nounVery Rare
/ˌθɜː.məʊ.bəˈrɒm.ɪ.tə/An instrument for measuring both temperature and atmospheric pressure.
thermochemistry
nounC2
/ˌθɜː.məʊˈkem.ɪ.stri/The branch of chemistry dealing with the study of the heat energy associated with chemical reactions and physical transformations.

Showing 2401–2420 of 7190 words.