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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)

thermogram
nounC2
/ˈθɜː.mə.ɡræm/A visual record or image produced by thermography, showing the distribution of temperature across a surface.
thermograph
nounC1
/ˈθɜː.mə.ɡrɑːf/An instrument that records temperature continuously over time.
thermography
nounC2
/θɜːˈmɒɡrəfi/A technique for producing an image using the infrared radiation (heat) emitted by an object.
thermojunction
nounVery Low
/ˌθɜːməʊˈdʒʌŋkʃən/A junction of two dissimilar metals that produces a voltage when heated, used in thermocouples.
thermoluminescence
nounC2
/ˌθɜː.məʊˌluː.mɪˈnes.əns/The emission of light from a material when it is heated.
thermoluminescence dating
nounVery low
/ˌθɜː.məʊˌluː.mɪˈnes.əns ˈdeɪ.tɪŋ/A scientific method for dating archaeological materials by measuring the light emitted from minerals (like quartz) when they are heated, which indicates the time elapsed since the material was last heated or exposed to sunlight.
thermolysis
nounC2
/θɜːˈmɒlɪsɪs/The decomposition or breakdown of a substance by heat.
thermometer
nounB1
/θəˈmɒm.ɪ.tə/An instrument for measuring temperature, typically using a sealed tube containing a fluid (like mercury or alcohol) that expands or contracts in response to heat changes.
thermometric titration
nounVery Low
/ˌθɜː.məʊˈmet.rɪk taɪˈtreɪ.ʃən/A titration method where the endpoint is determined by measuring temperature changes during the chemical reaction.
thermometry
nounC2 (very rare)
/θəˈmɒm.ɪ.tri/The science and practice of measuring temperature.
thermomotor
nounExtremely rare
/ˌθɜː.məʊˈməʊ.tər/An engine or motor that operates using heat, typically by converting thermal energy into mechanical work.
thermonasty
nounVery low
/ˈθɜː.mə(ʊ)ˌnæs.ti/A nastic movement in plants triggered by temperature change, not direction.
thermonuclear bomb
nounC2
/ˌθɜː.məʊˈnjuː.kli.ə bɒm/An immensely powerful explosive weapon that derives its destructive force from nuclear fusion reactions, where lighter atomic nuclei combine to form heavier ones, releasing vast amounts of energy.
thermonuclear reaction
nounlow
/ˌθɜːməʊˈnjuːkliə rɪˈækʃən/A nuclear reaction, typically fusion, that occurs at extremely high temperatures, such as in stars or hydrogen bombs.
thermoperiodicity
nounC2+
/ˌθɜː.məʊ.ˌpɪə.ri.əˈdɪs.ə.ti/The biological response of an organism to regular daily or seasonal cycles of temperature.
thermoperiodism
nounVery Low
/ˌθɜː.məʊˈpɪə.ri.ə.dɪ.zəm/The response of an organism to regular, daily fluctuations in temperature.
thermophile
adjectivenounC1+ / Specialised
/ˈθɜː.mə.faɪl/An organism, especially a microorganism, that thrives at relatively high temperatures, typically between 45 and 80°C (113 and 176°F).
thermophone
nounVery Rare
/ˈθɜːmə(ʊ)fəʊn/A device for producing sound by the expansion and contraction of air or other gas due to temperature variations, or by the heating effect of an alternating current.
thermophosphorescence
nounVery Low
/ˌθɜː.məʊ.ˌfɒs.fə.ˈres.əns/The property of a substance emitting light that persists for some time after the removal of a heat source.
thermopile
nounC2
/ˈθɜː.məʊ.paɪl/A device consisting of a series of thermocouples connected in series, used to generate an electrical voltage from a temperature difference.

Showing 2441–2460 of 7190 words.