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English Words Starting With T

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thiophen
nounC2 (Technical term, very low frequency in general discourse)
/ˈθaɪ.ə.fiːn/A heterocyclic organic compound with the formula C₄H₄S, consisting of a five-membered aromatic ring containing four carbon atoms and one sulfur atom.
thiophene
nounC2
/ˈθaɪ.ə.fiːn/A colourless, flammable, heterocyclic compound composed of a five-membered ring containing four carbon atoms and one sulfur atom (C₄H₄S).
thiophenol
nounVery Low
/ˌθaɪəʊˈfiːnɒl/An organosulfur compound consisting of a phenyl group bonded to a thiol (sulfur-hydrogen) group, with the formula C6H5SH.
thiophosphate
nounVery Low (Technical)
/ˌθaɪ.əʊˈfɒs.feɪt/A chemical compound where one or more oxygen atoms in a phosphate group are replaced by sulfur atoms.
thiophosphoric acid
nounVery Low
/ˌθaɪ.əʊ.fɒsˈfɒr.ɪk ˈæs.ɪd/A chemical compound, an oxyacid of phosphorus where one or more oxygen atoms are replaced by sulfur atoms.
thioridazine
nounC2
/ˌθaɪəʊˈrɪdəziːn/A phenothiazine derivative used as an antipsychotic medication, primarily in the treatment of schizophrenia.
thiosinamine
nounExtremely Low / Technical
/ˌθaɪə(ʊ)ˈsɪnəmiːn/A chemical compound also known as allyl thiourea, with the formula C4H8N2S.
thiosulfate
nounC2
/ˌθaɪə(ʊ)ˈsʌlfeɪt/A chemical compound containing the S₂O₃²⁻ anion, where a sulfur atom replaces an oxygen atom in a sulfate ion.
thiosulfuric acid
nounC2 (Proficient User - Specialized Technical)
/ˌθaɪəʊsʌlˈfjʊərɪk ˈæsɪd/An unstable inorganic acid, H₂S₂O₃, where one oxygen atom in sulfuric acid is replaced by a sulfur atom.
thiosulphate
nounVery Low
/ˌθaɪəʊˈsʌlfeɪt/A salt or ester of thiosulphuric acid, containing the anion S₂O₃²⁻.
thiosulphuric acid
nounVery low
/ˌθaɪəʊsʌlˈfjʊərɪk ˈæsɪd/An unstable chemical compound (H₂S₂O₃) containing sulfur in two oxidation states, analogous to sulfuric acid but with one oxygen atom replaced by sulfur.
thiothixene
nounVery Low
/ˌθaɪə(ʊ)ˈθaɪksiːn/A prescription medication used as an antipsychotic and neuroleptic agent.
thiouracil
nounVery Low
/ˌθaɪə(ʊ)ˈjʊərəsɪl/A sulfur-containing organic compound used primarily as an antithyroid drug.
thiourea
nounVery Low
/ˌθaɪəʊjʊˈriːə/A sulfur-containing organic compound with the formula SC(NH₂)₂, used in chemical synthesis and industrial processes.
thioxanthene
nounRare
/ˌθaɪəʊˈzænθiːn/A tricyclic organic compound consisting of two benzene rings fused to a central sulfur-containing ring, serving as the parent structure for certain antipsychotic medications.
thiram
nounC2
/ˈθʌɪram/A synthetic compound (tetramethylthiuram disulfide) used primarily as an agricultural fungicide and seed disinfectant.
third
adjectiveadverbnounA1
/θɜːd/Constituting the number three in a sequence; the ordinal form of three.
third age
nounC1
/ˌθɜːd ˈeɪdʒ/The period in life of active retirement, typically after finishing one's career but before the onset of significant physical or cognitive decline.
third amendment
nounLow/Medium
/ˌθɜːd əˈmendmənt/The amendment to the US Constitution that prohibits the government from forcing citizens to house (quarter) soldiers in their homes during peacetime without their consent.
third base
nounIntermediate
/ˌθɜːd ˈbeɪs/In baseball/softball, the third of four bases that a runner must touch to score a run.

Showing 2601–2620 of 7190 words.