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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)

thyestes
nounVery Rare
/θaɪˈestɪz/A character in Greek mythology, one of the kings of Mycenae, known for the tragic feast where he unknowingly ate his own children.
thylacine
nounLow
/ˈθaɪləsaɪn/A carnivorous marsupial native to Tasmania, now believed to be extinct, with a dog-like appearance and distinctive stripes on its back.
thylakoid
nounVery Low (C2)
/ˈθaɪləkɔɪd/A membrane-bound compartment inside chloroplasts and cyanobacteria. It is the site of the light-dependent reactions of photosynthesis.
thyme
nounC1
/taɪm/A low-growing, aromatic herb with small leaves used in cooking.
thymectomy
nounVery low frequency (technical medical term)
/θaɪˈmɛktəmi/A surgical procedure to remove the thymus gland.
thymidine
nounC2 (Proficient/Technical)
/ˈθaɪ.mɪ.diːn/A nucleoside component of DNA, consisting of thymine linked to deoxyribose.
thymidylic acid
nounvery low
/ˌθaɪmɪˈdɪlɪk ˈæsɪd/A nucleotide consisting of thymidine linked to a phosphate group, essential for DNA synthesis.
thymine
nounC2
/ˈθaɪ.miːn/A nitrogenous base, one of the four nucleobases in the nucleic acid DNA.
thymocyte
nounTechnical
/ˈθaɪməʊsaɪt/A lymphocyte that develops in the thymus gland.
thymol
nounVery Low (C2)
/ˈθaɪ.mɒl/A colorless crystalline compound with a strong aromatic odour, derived from thyme oil or other essential oils, used as an antiseptic and fungicide.
thymosin
nounRare
/ˈθaɪməsɪn/A hormone produced by the thymus gland that regulates immune function.
thymus
nounlow
/ˈθaɪməs/A small gland located in the upper chest, involved in the development of the immune system, particularly T-cells.
thyone
nounVery rare
/θaɪˈəʊni/In Greek mythology, the name given to Semele after her apotheosis, associated with Dionysus.
thyratron
nounVery low
/ˈθaɪrətrɒn/A gas-filled electronic tube used as a high-speed switch or relay, containing a hot cathode and one or more anodes, controlled by a grid.
thyristor
nounVery low (Specialized Technical)
/θaɪˈrɪstə/A solid-state semiconductor device with four layers of alternating p- and n-type materials, functioning as a controlled switch for electrical power.
thyrocalcitonin
nounLow/Very Low
/ˌθaɪ.rəʊ.kæl.sɪˈtəʊ.nɪn/A polypeptide hormone secreted by the C-cells of the thyroid gland in mammals, which lowers blood calcium levels by inhibiting bone resorption.
thyroid
adjectivenounC1
/ˈθaɪ.rɔɪd/A butterfly-shaped endocrine gland in the neck that produces hormones regulating metabolism, growth, and development.
thyroid gland
nounC1
/ˈθaɪ.rɔɪd ˌɡlænd/A large endocrine gland in the neck that produces hormones regulating metabolism, growth, and development.
thyroid stimulating hormone
nounLow in general English; common in medical and academic contexts.
/ˈθaɪ.rɔɪd ˈstɪm.jə.leɪ.tɪŋ ˈhɔː.məʊn/A hormone secreted by the anterior pituitary gland that stimulates the thyroid gland to produce thyroid hormones.
thyroidectomy
nounC1/C2
/ˌθaɪ.rɔɪˈdek.tə.mi/A surgical procedure to remove all or part of the thyroid gland.

Showing 3081–3100 of 7190 words.