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English Words Starting With D

7,181 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Suffix Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

dichlorophenoxyacetic acid
nounVery Low (Technical/Scientific)
/daɪˌklɔːrə(ʊ)fɛˌnɒksɪəˈsiːtɪk ˈæsɪd/A synthetic auxin used as a systemic herbicide, commonly known as a component of Agent Orange and in weed killers.
dichogamy
nounC2
/daɪˈkɒɡəmi/A biological mechanism in a single plant or hermaphroditic animal where the male and female reproductive organs mature at different times to prevent self-fertilization.
dichondra
nounC1
/daɪˈkɒndrə/A genus of low-growing, perennial, herbaceous plants with small, rounded leaves, often used as a ground cover or lawn substitute.
dichotomize
verbverb-intransitiveverb-transitiveC2
/daɪˈkɒt.ə.maɪz/To divide or classify something into two opposing or sharply contrasting groups or categories.
dichotomous key
nounC1/C2
/daɪˈkɒt.ə.məs kiː/A tool for identifying organisms or objects by making a series of choices between two contrasting characteristics at each step.
dichotomous question
nounC2
/daɪˈkɒt.ə.məs ˈkwes.tʃən/A question that offers only two mutually exclusive answer options, typically 'yes/no', 'true/false', or 'A/B'.
dichotomy
nounC1
/daɪˈkɒtəmi/A division into two parts, groups, or classes that are sharply opposed, contrasted, or mutually exclusive.
dichroic filter
nounC2
/daɪˈkrəʊ.ɪk ˈfɪl.tə(r)/A specialized optical device that transmits light within a specific wavelength range while reflecting all other wavelengths.
dichroism
nounC2
/ˈdaɪkrəʊɪz(ə)m/The property of certain materials to show different colours when viewed from different directions, especially under polarized light.
dichroite
nounRare/Technical
/ˈdaɪkrəʊaɪt/A mineral, specifically cordierite, which exhibits two different colours when viewed from different angles.
dichromate
nounC2
/daɪˈkrəʊmeɪt/A chemical compound containing the anion Cr2O7^2-.
dichromaticism
nounC2
/ˌdaɪ.krəʊˈmæt.ɪ.sɪ.zəm/The condition of having or using only two colours.
dichromatism
nounVery Low
/daɪˈkrəʊmətɪz(ə)m/The condition of having vision based on only two types of colour-sensitive cells (cones), resulting in a limited ability to distinguish certain colours.
dichromic acid
nounVery Low (Technical)
/ˌdaɪˈkrəʊmɪk ˈæsɪd/An unstable chemical compound with the formula H₂Cr₂O₇, formed from chromic acid.
dichroscope
nounRare / Technical
/ˈdaɪ.krə.skəʊp/A handheld optical instrument used to detect the pleochroism of minerals (the property of exhibiting different colours when viewed from different directions).
dicing
nounB1
/ˈdaɪ.sɪŋ/The act of cutting food into small cubes, typically around 5–10mm.
dick
nounMedium-High (in informal speech), Low (in formal contexts)
/dɪk/The male sexual organ; a penis.
dick pic
nounC2
/ˈdɪk ˌpɪk/A photograph of a man's penis, typically unsolicited and sent digitally.
dick test
nounRare / Historical
/ˈdɪk ˌtɛst/A historical skin test used to determine susceptibility to scarlet fever.
dickcissel
nounVery Low
/ˈdɪkˌsɪs.əl/A small North American songbird (Spiza americana) with a distinctive call that sounds like its name, typically found in grasslands and agricultural fields.

Showing 3121–3140 of 7181 words.