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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)

serratia
nounC2/Professional
/səˈreɪʃə/A genus of Gram-negative, rod-shaped bacteria, typically found in water, soil, and some animals, some species of which can cause opportunistic infections in humans.
serration
nounC2
/səˈreɪ.ʃən/A condition or formation of having a saw-toothed edge with notches or teeth pointing toward one direction; the individual notch or tooth itself.
serre-papier
nounLow
/ˈsɛə ˌpæpiˈeɪ/A device for holding papers together; a paper clip or binder clip.
serrulation
nounC2
/ˌsɛrjʊˈleɪʃ(ə)n/The state or condition of having a finely notched or saw-like edge.
serrurerie
nounLow
/ˌsɛrʊˈrəri/the trade, workshop, or products of a locksmith or ironworker; locksmithing and metal fabrication.
serry
verb-ambitransitiveVery Rare/Obsolete
/ˈsɛri/To press or crowd together, especially in a military formation.
sert
nounVery low
/sɜːt/To insert, thrust, or join something into something else; to fit together.
sertorius
nounVery Low
/səˈtɔː.ri.əs/Quintus Sertorius, a Roman statesman and general (c. 126–73 BC).
sertraline
nounLow (specialized vocabulary)
/ˈsɜːtrəliːn/A selective serotonin reuptake inhibitor (SSRI) antidepressant medication used to treat major depressive disorder, anxiety disorders, obsessive-compulsive disorder, and other conditions.
sertularian
nounC2
/ˌsɜːtjʊˈlɛərɪən/A type of colonial marine animal related to hydroids, resembling a tiny branching plant.
serum
nounB2
/ˈsɪərəm/The clear, pale-yellow liquid that separates from blood when it clots, containing antibodies, proteins, and other substances.
serum albumin
nounC2
/ˌsɪər.əm ˈæl.bjʊ.mɪn/The main protein found in blood plasma.
serum globulin
nounC2
/ˈsɪərəm ˈɡlɒbjʊlɪn/A class of proteins found in blood plasma, part of the immune system's antibody response.
serum hepatitis
nounLow (technical/medical)
/ˌsɪər.əm ˌhep.əˈtaɪ.tɪs/An inflammatory liver disease primarily transmitted through contact with infected blood or blood products.
serum sickness
nounLow-frequency technical term
/ˈsɪər.əm ˌsɪk.nəs/A delayed immune system reaction, typically occurring 1-2 weeks after administration of a non-human serum or certain drugs, characterized by fever, joint pain, rash, and lymph node swelling.
serval
nounRare
/ˈsɜː.vəl/A medium-sized wild African cat with a slender build, long legs, a short tail, and a tawny coat with black spots and stripes.
servant
nounB2
/ˈsɜːv(ə)nt/A person employed to perform domestic or personal duties in someone's household.
servant church
nounLow
/ˈsɜːvənt tʃɜːtʃ/A Christian church that models its mission on service to others, emphasizing humility, community support, and social action over institutional power.
serve
nounverbverb-intransitive+1B1
/sɜːv/To perform duties or provide a service for; to give food or drink to someone.
server
nounHigh
/ˈsɜː.vər/A person or thing that serves, especially one who serves food or drink, or a computer system that provides data or services to other computers.

Showing 4161–4180 of 15552 words.