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English Words Starting With D

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dimethylcarbinol
nounVery low frequency, C2/proficiency level, technical/scientific register only.
/ˌdaɪ.mɛθ.əlˈkɑː.bɪ.nɒl/A chemical compound which is a simple tertiary alcohol, also known as isopropyl alcohol or rubbing alcohol when referring to its common 70% aqueous solution.
dimethylformamide
nounVery Low (technical term)
/dʌɪˌmiːθ(ʌ)ɪlˈfɔːməmaɪd/A colourless, organic, polar solvent with the chemical formula (CH₃)₂NC(O)H.
dimethylhydrazine
nounVery low frequency / Specialist terminology
/daɪˌmɛθ(ə)lˈhaɪdrəziːn/A volatile, toxic, and flammable organic compound used primarily as a rocket fuel.
dimethylketol
nounVery Low
/ˌdaɪˌmeθɪlˈkiːtɒl/An unstable organic compound with the formula CH₃C(O)CH₂OH; a hydroxy ketone.
dimethylketone
nounVery Low
/ˌdʌɪmiːθʌɪlˈkiːtəʊn/The systematic chemical name for acetone, the simplest ketone with the formula (CH₃)₂CO.
dimethylmethane
nounC2/Technical/Very Low
/ˌdaɪˌmiːθaɪlˈmiːθeɪn/The common name for the hydrocarbon propane (C₃H₈).
dimethylnitrosamine
nounC2
/daɪˌmɛθəlnaɪˈtrəʊsəmiːn/A highly toxic, carcinogenic chemical compound, often found in small amounts in certain foods, tobacco smoke, and industrial environments.
dimethylsulphoxide
nounVery Low
/ˌdaɪˌmiːθaɪlˌsʌlfˈɒksaɪd/A colourless, hygroscopic organic solvent with the chemical formula (CH₃)₂SO, known for its ability to penetrate biological membranes.
dimethyltryptamine
nounVery Low
/ˌdaɪ.mɛθ.əlˈtrɪp.tə.miːn/A powerful psychedelic compound of the tryptamine family, found naturally in some plants and animals.
dimetrodon
nounRare
/daɪˈmiːtrədɒn/A large, extinct, early Permian synapsid (mammal-like reptile) known for its distinctive elongated neural spines forming a sail-like structure on its back.
dimidiate
adjectiveverbExtremely low / Obsolete
/dɪˈmɪdɪeɪt/to divide into two equal parts; to halve.
diminish
verbverb-intransitiveverb-transitiveB2
/dɪˈmɪnɪʃ/to make or become smaller, weaker, or less significant in size, amount, value, or importance.
diminished responsibility
nounLow
/dɪˈmɪnɪʃt rɪˌspɒnsəˈbɪləti/A legal defence in which a defendant's mental capacity is argued to be impaired, reducing their culpability for a crime.
diminished seventh chord
nounC2
/dɪˈmɪnɪʃt ˈsɛvnθ kɔːd/A chord consisting of a diminished triad (root, minor third, and diminished fifth) plus a diminished seventh interval above the root, creating a symmetrical, dissonant sound.
diminishing returns
nounplural-nounC1
/dɪˈmɪnɪʃɪŋ rɪˈtɜːnz/An economic principle stating that after a certain point, adding more of a factor of production (e.g., labour, capital) results in smaller increases in output or benefit.
diminuendo
adjectivenounLow
/dɪˌmɪnjuˈɛndəʊ/A musical instruction indicating a gradual decrease in loudness (symbol: >).
diminution
nounC1/C2
/ˌdɪm.ɪˈnjuː.ʃən/A reduction in the size, extent, importance, or quantity of something.
diminutive
adjectivenounC1
/dɪˈmɪnjətɪv/Extremely or unusually small.
dimitrios i
nounVery Low
/dɪˈmɪt.ri.ɒs ðə ˈfɜːst/A proper noun referring to a specific historical figure, typically a male given name of Greek origin, often associated with royalty or historical significance.
dimitrov
nounVery Low
/ˈdɪmɪtrɒf/A proper noun referring to a Bulgarian surname, most famously associated with Georgi Dimitrov, a prominent 20th-century communist leader and statesman.

Showing 3501–3520 of 7181 words.