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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)

tetrahydrocannabinol
nounLow
/ˌtɛtrəˌhaɪdrə(ʊ)kəˈnabɪnɒl/The principal psychoactive chemical compound found in the cannabis plant.
tetrahydrofuran
nounVery low frequency (technical term)
/ˌtɛtrəˌhaɪdrəʊˈfjʊəræn/A colourless, volatile, cyclic organic solvent with the formula C4H8O.
tetrahydrogestrinone
nounVery Low
/ˌtɛtrəˌhaɪdrəʊˈdʒɛstrɪnəʊn/A synthetic anabolic steroid developed for its undetectable properties in doping tests.
tetrahydrozoline
nounlow
/ˌtɛtrəˌhaɪdrə(ʊ)ˈzəʊliːn/A vasoconstrictor drug, most commonly found in over-the-counter eye drops, used to reduce redness in the eyes.
tetrahymena
nounC1
/ˌtɛtrəˈhaɪmɪnə/A genus of free-living, freshwater ciliate protozoans used extensively as model organisms in biological research.
tetralite
nounVery Low
/ˈtɛtrəlaɪt/A high explosive material composed primarily of tetranitromethane, known for its powerful blast and shattering effect.
tetralogy
nounC2
/tɛˈtrælədʒi/A group of four related works (e.g., novels, plays, operas).
tetralogy of fallot
nounC1-C2
/tɛˈtrælədʒi əv ˈfæləʊ/A congenital heart defect consisting of four specific anatomical abnormalities of the heart that affect blood flow and oxygenation.
tetramer
nounC2 / Highly Specialized Technical
/ˈtɛtrəmə/A molecule or chemical structure composed of four identical or similar subunits (monomers) linked together.
tetrameter
adjectivenounC2
/tɛˈtræmɪtə/A line of verse consisting of four metrical feet.
tetramethyldiarsine
nounVery Rare
/ˌtɛtrəˌmɛθaɪldaɪˈɑːsaɪn/A chemical compound containing two arsenic atoms bonded with four methyl groups.
tetramethyllead
nounC2 (Very Low Frequency)
/ˌtɛtrəˌmɛθɪlˈlɛd/A highly toxic organolead compound with the chemical formula Pb(CH₃)₄, historically used as an antiknock additive in petrol/gasoline.
tetranitrate
nounVery Low
/ˌtɛtrəˈnaɪtreɪt/A chemical compound containing four nitrate groups.
tetraplegia
nounLow
/ˌtɛtrəˈpliːdʒə/Paralysis of all four limbs and typically the torso, resulting from injury to the cervical spinal cord.
tetraploid
adjectivenounC1
/ˈtɛtrəplɔɪd/having four sets of chromosomes in each cell, a specific type of polyploidy.
tetrapod
adjectivenounLow in everyday usage, common in academic and technical contexts.
/ˈtɛtrəpɒd/A vertebrate animal with four limbs, such as amphibians, reptiles, birds, and mammals.
tetrapody
nounC2
/ˈtɛtrəpədi/A metrical unit or verse consisting of four metrical feet.
tetrapylon
nounLow / Very Low (Specialist)
/ˌtɛtrəˈpʌɪlən/An ancient monumental gateway or arch with four entrances, typically standing at the intersection of two major streets in a Roman city.
tetrarch
nounC2 / Very Low
/ˈtetrɑːk/A governor of one of four divisions of a province (particularly in the ancient Roman Empire); a subordinate ruler.
tetrarchy
nounC1/C2
/ˈtɛtrɑːki/A form of government in which power is divided among four individuals.

Showing 2061–2080 of 7190 words.