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English Words Starting With S
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- surface density/ˈsɜː.fɪs ˈden.sɪ.ti/The mass or quantity of something per unit area.nounC1/C2 (Advanced)
- surface effect ship/ˈsɜː.fɪs ɪˌfɛkt ʃɪp/A vessel that rides on a cushion of air trapped beneath its hull, reducing drag and allowing for high speeds.nounLow (Technical)
- surface friction drag/ˈsɜːfɪs ˈfrɪkʃən dræɡ/The component of aerodynamic drag that results directly from the viscous friction of a fluid moving over the surface of a body.nounC2/Highly Specialized
- surface integral/ˈsɜː.fɪs ˈɪn.tɪ.ɡrəl/A mathematical integral computed over a two-dimensional surface in three-dimensional space, used to calculate quantities such as surface area or flux of a vector field.nounLow in everyday language, high in academic and technical contexts.
- surface mail/ˈsɜːfɪs meɪl/Mail transported by land or sea rather than by air.nounC1
- surface noise/ˈsɜːfɪs nɔɪz/The audible crackles, pops, and hisses produced when a phonograph needle or stylus plays a physical recording (like a vinyl record), caused by imperfections in the record's surface, dust, or wear.nounLow/Medium (common in audio/vinyl enthusiast contexts, rare in general conversation)
- surface of light and shade/ˈsɜːfɪs əv laɪt ənd ʃeɪd/The literal topmost layer or outer area where illumination and shadow interact.nounC2 / Very low frequency (primarily literary/technical)
- surface of projection/ˈsɜː.fɪs əv prəˈdʒɛk.ʃən/A geometrical plane or surface onto which points, lines, or objects are projected or mapped in order to represent them in a different dimension or form.nounC2
- surface of revolution/ˌsɜː.fɪs əv ˌrev.əˈluː.ʃən/A three-dimensional surface created by rotating a two-dimensional curve around a straight axis within the same plane.nounC1+ / Specialized
- surface plate/ˈsɜːfɪs ˌpleɪt/A flat, rigid plate of metal, stone, or glass with a very precise, level surface, used as a reference plane for measuring or checking the flatness of other surfaces in precision engineering and manufacturing.nounTechnical/Very Low Frequency
- surface road/ˈsɜːfɪs rəʊd/A road designed for travel at the ground level, typically characterized by intersections and access to adjacent properties, as opposed to an elevated freeway or limited-access highway.nounC1
- surface structure/ˈsɜː.fɪs ˌstrʌk.tʃər/In linguistics, the actual spoken or written form of a sentence, as opposed to its underlying abstract meaning.nounC1
- surface tension/ˈsɜːfɪs ˌtenʃən/The elastic tendency of a liquid surface to minimize its area, caused by cohesive forces between molecules at the surface.nounC1
- surface wave/ˈsɜː.fɪs ˌweɪv/A seismic wave that travels along the Earth's surface, with its motion concentrated near the ground level; also, in physics, an electromagnetic or mechanical wave that propagates along an interface between two media, decaying exponentially away from it.nounC1+
- surface-active agent/ˈsɜː.fɪs ˈæk.tɪv ˈeɪ.dʒənt/A chemical substance that reduces surface tension between liquids or between a liquid and a solid, commonly used in detergents and emulsifiers.nounTechnical
- surface-printing/ˈsɜː.fɪs ˌprɪn.tɪŋ/A printing method where ink is applied to the raised, flat surface of a printing plate, as opposed to etched or engraved areas.nounLow
- surfacing/ˈsɜː.fɪ.sɪŋ/The act of coming to or appearing on the surface.nounB2
- surfactant/sɜːˈfæk.tənt/A substance that reduces the surface tension between two liquids or between a liquid and a solid, allowing them to mix more easily.adjectivenounC1
- surfbird/ˈsɜːfˌbɜːd/A small, plump shorebird of the Pacific coasts of North and South America.nounC2
- surfboard/ˈsɜːf.bɔːd/A long, narrow board used for riding on the crest of ocean waves, typically made of foam, fiberglass, or other buoyant material.nounverb-intransitiveB1
Showing 14541–14560 of 15552 words.