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English Words Starting With S

15,552 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)

selenga
nounRare / Very Low Frequency (Toponym)
/səˈlɛŋɡə/A river in Asia, flowing from Mongolia into Lake Baikal in Russia.
selenic acid
nounC2
/sɪˌliːnɪk ˈæsɪd/A strong, corrosive, inorganic acid containing selenium in its highest oxidation state (+6), with the chemical formula H2SeO4.
selenide
nounLow
/ˈsɛlɪnaɪd/A chemical compound containing selenium with a more electropositive element or group.
selenious acid
nounLow
/sɪˈliːniəs ˈæsɪd/A chemical compound with the formula H₂SeO₃, an oxoacid of selenium.
selenite
nounLow
/ˈsɛlɪnʌɪt/A transparent crystalline form of gypsum (calcium sulphate dihydrate).
selenium
nounC2
/sɪˈliː.ni.əm/A chemical element (Se) with atomic number 34, a nonmetal with properties intermediate between sulphur and tellurium, used in electronics, glassmaking, and some dietary supplements.
selenium cell
nounRare/Very Low
/səˈliːniəm sɛl/A photoelectric device that converts light energy into electrical energy using the element selenium as the photosensitive material.
selenium rectifier
nounVery Low
/sɪˈliːniəm ˈrɛktɪfaɪə/A type of electrical device that converts alternating current (AC) to direct current (DC) using a selenium metal disc.
selenodesy
nounVery Low (Obscure/Technical)
/ˌsɛlɪˈnɒdɪsi/The scientific study of the shape, dimensions, and gravitational field of the Moon; lunar geodesy.
selenodont
adjectivenounVery low (extremely rare)
/sɪˈliːnədɒnt/Having teeth with crescent-shaped ridges on the crown.
selenography
nounC2
/ˌsɛlɪˈnɒɡrəfi/The scientific study and mapping of the Moon's surface features.
selenology
nounC2+
/ˌsɛlɪˈnɒlədʒi/The scientific study of the Moon, including its physical features, composition, origin, and development.
selenomorphology
nounExtremely rare / Technical jargon
/ˌsɛlɪnəʊmɔːˈfɒlədʒi/The scientific study of the surface features and forms of the Moon.
selenotropism
nounVery Low
/ˌsɛlɪˈnɒtrəpɪz(ə)m/The turning or growth of a plant in response to moonlight.
seler
nounHigh
/ˈselə(r)/A person or company that offers goods or services for sale.
seles
nounVery Low
/ˈsiːliːz/Plural of 'sele': an archaic or dialect term meaning a hall or time of prosperity.
seleucia
nounRare
/sɪˈluːʃə/A historical city or region, most notably the name of several ancient cities in the Seleucid Empire.
seleucid
adjectivenounC2+ (Very rare)
/sɪˈluːsɪd/Relating to the Hellenistic kingdom founded by Seleucus I Nicator after the death of Alexander the Great, covering parts of Asia from the Mediterranean to India.
seleucus
nounLow
/sɪˈljuːkəs/Seleucus I Nicator, a Macedonian general and successor of Alexander the Great, founder of the Seleucid Empire.
seleucus i
nounVery Low
/sɪˈluːkəs ðə ˈfɜːst/The proper name of a historical figure, specifically Seleucus I Nicator, a Macedonian general and founder of the Seleucid Empire after the death of Alexander the Great.

Showing 3441–3460 of 15552 words.