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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)

diadochokinesia
nounSpecialist
/daɪˌædəkəʊkɪˈniːziə/The ability to perform rapid alternating movements, such as turning the hand over and back repeatedly.
diadochy
nounVery Low
/daɪˈæd.ə.ki/The condition of two ions or elements substituting for one another in a crystal lattice without significant structural change.
diaeresis
nounC2
/daɪˈɪərɪsɪs/A mark (¨) placed over a vowel to indicate it is pronounced in a separate syllable from a preceding vowel.
diagenesis
nounVery low
/ˌdaɪəˈdʒɛnɪsɪs/The physical, chemical, and biological changes that sedimentary rock undergoes after deposition and before metamorphism.
diageotropism
nounC2
/ˌdaɪ.ə.dʒiːˈɒt.rə.pɪ.zəm/A growth response in a plant or plant part oriented horizontally due to gravity.
diaghilev
nounLow (mainly in cultural/historical contexts)
/ˈdjɑːɡɪlɛf/A proper noun referring to Serge Diaghilev (1872–1929), the influential Russian ballet impresario and founder of the Ballets Russes.
diagnose
verbverb-intransitiveverb-transitiveC1
/ˈdaɪəɡnəʊz/To identify the nature of an illness or problem through examination and analysis.
diagnosis
nounC1
/ˌdaɪəɡˈnəʊsɪs/The process of identifying a disease, illness, or problem by examining its signs and symptoms.
diagnostic
adjectivenounC1
/ˌdaɪəɡˈnɒstɪk/Used to identify or analyse the nature or cause of something, especially a problem or disease.
diagnosticate
verb-ambitransitiveExtremely rare / Obsolete
/ˌdaɪəɡˈnɒstɪkeɪt/To diagnose; to determine or identify the nature of a problem, especially a disease or fault.
diagnostician
nounC1
/ˌdaɪ.əɡ.nɒˈstɪʃ.ən/A person who is skilled in identifying diseases or other medical conditions from their symptoms or from data analysis.
diagnostics
nounC1
/ˌdaɪəɡˈnɒstɪks/The process or methods used to identify the nature or cause of a problem, especially in medicine or technology.
diagonal
adjectivenounB1
/daɪˈæɡ.ən.əl/A straight line joining two non-adjacent corners or vertices of a polygon or polyhedron, or describing something slanting at an angle.
diagonal cloth
nounLow
/daɪˈæɡ.ən.əl klɒθ/A type of fabric or material woven in a diagonal pattern, typically characterized by a twill weave that creates a visible, parallel rib or line.
diagonal matrix
nounC2
/ˌdaɪˈæɡ.ən.əl ˈmeɪ.trɪks/A square matrix in which all entries outside the main diagonal are zero.
diagonal process
nounLow (Highly specialized technical term)
/daɪˈæɡ.ən.əl ˈprəʊ.ses/A mathematical technique or proof method for constructing an object by systematically working along the diagonal of an infinite array or sequence.
diagonalize
verb-transitiveC1-C2 / Very Low Frequency / Technical
/daɪˈæɡ.ən.əl.aɪz/To convert a matrix into a diagonal matrix using similarity transformations, a fundamental operation in linear algebra.
diagram
nounverbverb-transitiveB2
/ˈdaɪ.ə.ɡræm/A simplified drawing, plan, or chart that explains or shows the structure, workings, or relationship between parts of something.
diagraph
nounC2
/ˈdaɪəɡrɑːf/A drawing instrument combining a protractor and scale for copying or enlarging drawings.
diakinesis
nounvery low
/ˌdaɪəkɪˈniːsɪs/The final stage of prophase I in meiosis, where chromosomes are fully condensed, homologous chromosomes are separated, and the nuclear envelope begins to disintegrate.

Showing 2921–2940 of 7181 words.