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English Words Starting With S
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- sphenoid bone/ˈsfiː.nɔɪd bəʊn/The large, complex, unpaired bone forming the base of the skull behind the eyes, often described as butterfly-shaped.nounC2
- sphenopsid/sfɪˈnɒpsɪd/Any vascular plant of the class Sphenopsida, characterized by jointed, hollow stems and small, whorled leaves; commonly known as horsetails.nounVery Low
- sphere of influence/sfɪər əv ˈɪnflʊəns/A geographical area or conceptual domain over which a state, organization, or individual exerts significant control, authority, or effect.nounC1
- spherical aberration/ˈsfɛrɪkəl ˌæbəˈreɪʃ(ə)n/A type of optical defect in lenses or mirrors where light rays from different parts of the surface focus at different points, causing blurred or distorted images.nounLow frequency
- spherical angle/ˈsfɛrɪkəl ˈæŋɡl/The angle formed at the intersection of two great circles on a sphere.nounC1/C2
- spherical astronomy/ˌsfɛrɪkəl əˈstrɒnəmi/The branch of astronomy dealing with the mathematical description of celestial positions and motions on the imaginary celestial sphere, using spherical geometry.nounC2
- spherical coordinate/ˈsfɛrɪkəl kəʊˈɔːdɪnət/One of a set of three numbers (typically radius, polar angle, and azimuthal angle) used to locate a point in three-dimensional space relative to a fixed origin.nounC2
- spherical coordinates/ˈsfɛrɪkəl kəʊˈɔːdɪnəts/A system for locating points in three-dimensional space using distance from a central point (radius) and two angles (polar and azimuthal).plural-nounC1/C2
- spherical excess/ˈsfɛrɪkəl ˈɛksɛs/The amount by which the sum of the angles of a spherical triangle exceeds 180 degrees (π radians).nounVery Low (Specialist Technical)
- spherical geometry/ˌsfɛrɪkəl dʒiˈɒmətri/The branch of geometry concerned with the properties and figures of a sphere's surface.nounC2
- spherical polygon/ˈsfɛrɪkəl ˈpɒlɪɡən/A closed geometric figure on the surface of a sphere, formed by arcs of great circles.nounC2
- spherical sailing/ˈsfɛrɪkəl ˈseɪlɪŋ/A specific navigation method used to plan and follow the shortest possible route across the open ocean, accounting for the Earth's curvature.nounVery Low
- spherical triangle/ˈsfɛrɪkəl ˈtraɪæŋɡl/A figure formed on the surface of a sphere by three arcs of great circles that intersect pairwise.nounLow
- spherical trigonometry/ˈsfɛrɪkəl ˌtrɪɡəˈnɒmɪtri/The branch of mathematics dealing with triangles formed on the surface of a sphere.nounLow-frequency technical term
- sphericity/sfɪəˈrɪs.ɪ.ti/The quality or state of being perfectly round, like a sphere.nounC2
- spherics/ˈsfɛrɪks/The branch of mathematics dealing with the geometry of the sphere.nounVery Low
- spheroid/ˈsfɪərɔɪd/A three-dimensional shape that is approximately spherical but not perfectly so; a sphere-like ellipsoid.adjectivenounLow frequency in general conversation; medium-high frequency in technical/scientific contexts.
- spheroidicity/ˌsfɪərɔɪˈdɪsɪti/The quality or state of being spheroid (i.e., nearly but not perfectly spherical).nounVery Rare
- spherometer/sfɪəˈrɒm.ɪ.tə/A precision instrument for measuring the curvature or radius of spherical surfaces.nounVery Low
- spheroplast/ˈsfɪər.ə.plæst/A bacterial or plant cell that has had its cell wall partially or completely removed, typically through enzymatic action, resulting in a spherical shape and osmotically fragile structure.nounVery low (C2/Technical)
Showing 10061–10080 of 15552 words.