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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)

diamondback moth
nounLow
/ˈdaɪəməndbæk mɒθ/A small, migratory moth (Plutella xylostella) whose larvae are serious pests of cruciferous crops worldwide.
diamondback rattlesnake
nounLow
/ˈdaɪəməndbæk ˈrætlsneɪk/A large, venomous pit viper of the genus Crotalus, characterized by diamond-shaped markings along its back and a rattle at the end of its tail.
diamondback terrapin
nounLow
/ˈdaɪ(ə)məndbak ˈtɛrəpɪn/A medium-sized, semi-aquatic turtle native to coastal brackish waters and estuaries of the eastern and southern United States, characterized by diamond-shaped markings on its shell.
diamorphine
nounLow
/ˌdaɪəˈmɔːfiːn/A powerful, semi-synthetic opioid analgesic drug derived from morphine.
diamyl sulfide
nounC2
/ˌdaɪ.æ.mɪl ˈsʌl.faɪd/A chemical compound belonging to the class of thioethers, consisting of two amyl (pentyl) groups bonded to a sulfur atom. It is a clear, flammable liquid with a strong, unpleasant odor.
diana
nounLow-medium
/daɪˈænə/A Roman goddess associated with the moon, hunting, woodlands, and chastity.
dianoia
nounRare / Technical
/ˌdʌɪəˈnɔɪ.ə/The act or faculty of discursive thinking or reasoning, as distinct from immediate intuition (nous).
dianthus
nounLow
/daɪˈænθəs/A genus of flowering plants in the family Caryophyllaceae, commonly known as carnations or pinks.
diapason
nounC2
/ˌdaɪ.əˈpeɪ.z(ə)n/A grand swelling burst of harmony; a fixed standard of musical pitch.
diapason normal pitch
nounRare / Highly Technical
/ˌdaɪ.əˈpeɪ.zən ˈnɔː.məl ˌpɪtʃ/The historical, internationally agreed-upon standard for the tuning of musical instruments, setting A above middle C to 440 Hz.
diapause
nounverb-intransitiveC2
/ˈdaɪəpɔːz/A period of suspended development or dormancy in an insect, arthropod, or other organism, triggered by seasonal or environmental conditions.
diapedesis
nounVery low
/ˌdaɪəpɪˈdiːsɪs/The passage of blood cells, especially leukocytes, through the intact walls of capillaries into the surrounding tissue.
diapente
nounVery Low / Technical
/ˌdʌɪəˈpɛnti/A musical interval of a perfect fifth.
diaper
nounverbverb-transitiveB2
/ˈdʌɪəpə/a piece of absorbent material wrapped around a baby's bottom and between its legs to absorb and contain urine and feces.
diaper rash
nounMedium-High (Common in parenting/childcare contexts, rare elsewhere)
/ˈdaɪ.pə ˌræʃ/A skin irritation or inflammation on a baby's bottom and genital area caused by prolonged contact with urine or feces in a diaper.
diaphaneity
nounVery Low (Academic/Technical)
/ˌdaɪ.ə.fəˈniː.ɪ.ti/The quality of being transparent or translucent; allowing light to pass through so objects behind can be seen.
diaphanometer
nounExtremely rare
/daɪˌæf.əˈnɒm.ɪ.tə/An instrument for measuring the transparency or translucency of a medium, such as air or water.
diaphone
nounC2 / Very Low
/ˈdaɪəfəʊn/In phonetics, a diaphone is a vowel or consonant sound that has several variations in pronunciation among different speakers or dialects of the same language, but which speakers perceive as being the same sound. In historical linguistics, it also refers to a set of related sounds occurring in genetically related languages that originate from a single ancestral sound (phoneme).
diaphony
nounVery Rare / Technical
/daɪˈæf.ən.i/A discordant or dissonant combination of sounds; a lack of harmony in music or speech.
diaphorase
nounC2
/daɪˈæf.ə.reɪz/An enzyme that facilitates the transfer of electrons from a reduced coenzyme (like NADH or NADPH) to a non-heme iron acceptor (like a cytochrome, or artificial dye). It's a crucial electron-transfer component in metabolic pathways.

Showing 3001–3020 of 7181 words.