Browse by letter
English Words Starting With S
15,552 entries — pick a word to see its definition, pronunciation, and usage.
Filter
Parts of speech
- sideman/ˈsʌɪdmən/A supporting musician, especially in a jazz, rock, or pop band, who is not the leader.nounLow
- sidepiece/ˈsʌɪdpiːs/A person with whom one is having a romantic or sexual relationship outside of a committed partnership, often secretively.nounC2+
- sidereal day/saɪˈdɪə.ri.əl deɪ/The time it takes for the Earth to complete one full rotation relative to the distant, fixed stars, approximately 23 hours, 56 minutes, and 4.1 seconds.nounC2 / Very Low Frequency
- sidereal hour/saɪˌdɪə.ri.əl ˈaʊə(r)/A unit of time equal to 1/24th of a sidereal day, based on Earth's rotation relative to distant stars rather than the sun.nounC2
- sidereal hour angle/saɪˌdɪə.ri.əl ˈaʊə(r) ˌæŋ.ɡl̩/The angular distance of a celestial body measured westward along the celestial equator from the celestial meridian to the hour circle of the body, expressed in hours, minutes, and seconds.nounVery Low / Technical
- sidereal month/sʌɪˈdɪərɪəl muːnθ/The time taken for the Moon to complete one full orbit around Earth, measured relative to the fixed stars, approximately 27.3217 days.nounC2
- sidereal period/saɪˌdɪə.ri.əl ˈpɪə.ri.əd/The orbital period of a celestial body relative to the fixed stars, not the Sun.nounVery Low (Specialist/Astronomy)
- sidereal time/saɪˈdɪə.ri.əl taɪm/A timekeeping system based on the Earth's rate of rotation measured relative to the fixed stars.nounLow
- sidereal year/sʌɪˈdɪə.ri.əl jɪə/The time taken for the Earth to complete one orbit around the Sun relative to the fixed stars.nounC2
- siderite/ˈsɪdərʌɪt/A mineral, iron carbonate (FeCO3), often found in sedimentary deposits and as a constituent of certain ores.nounC1
- sideroad/ˈsaɪd.rəʊd/A road that runs alongside a main road or joins a main road; a smaller, less important road off a primary route.nounB2
- siderochrome/ˈsɪdərə(ʊ)krəʊm/A type of iron-binding molecule produced by microorganisms to sequester iron from their environment.nounVery Low
- siderocyte/ˈsɪd(ə)rə(ʊ)ˌsʌɪt/An abnormal red blood cell containing granules of non-haem iron.nounVery Low
- siderography/ˌsɪdəˈrɒɡrəfi/The art or process of engraving on steel.nounVery Rare / Technical / Obsolete
- siderolite/ˈsɪdərə(ʊ)lʌɪt/A type of meteorite composed of both metallic (iron-nickel) and silicate (rocky) materials.nounVery Low
- siderophile/ˈsɪd(ə)rə(ʊ)fʌɪl/Having an affinity for iron; in geology and chemistry, describing elements that are found alloyed with iron in planetary cores.adjectivenounVery Rare
- siderophilin/ˌsɪdəˈrɒfɪlɪn/A glycoprotein that binds and transports iron in blood plasma.nounExtremely Low
- sideroscope/ˈsaɪdərəskəʊp/A historical scientific instrument designed to detect the presence of meteoric iron or nickel in minerals.nounExtremely Rare / Obsolete
- siderosis/ˌsɪdəˈrəʊsɪs/A medical condition characterised by the deposition of iron or iron oxide in bodily tissues, most commonly in the lungs.nounLow
- siderostat/ˈsaɪdərəʊˌstæt/A telescope-mounted mirror that moves to reflect light from a fixed star or celestial object into a stationary instrument, compensating for Earth's rotation.nounRare/Technical
Showing 5981–6000 of 15552 words.