spectral emissivity,光譜發射率

spectral half width,光譜半寬度

spectral line,光譜線

spectral position,光譜位置

spectral radiance,光譜輻射亮度

spectral radiation exitance,光譜輻（射）出（射）度

spectral range,光譜范圍

spectral resolution,光譜分辨率

spectral slit width,光譜狹縫寬度

spectro chemical analysis,光譜化學分析

spectrofluorophotometer,熒光分光光度計

spectrograph,攝譜儀

spectrometer,光譜儀

spectrometer channel,分光波道

spectrophotometer,分光光度計

spectrophotometric titration,分光光度滴定法

spectropolarimeter,旋光儀

spectroscopy,看譜鏡；能譜法

spectrum,光譜；譜

spectrum analyzer,頻譜分析儀

spectrum radiator,光譜輻射計

speech recognition,語音識別

speed characteristic,轉速特性

speed control system,調速系統

speed effect,速度效應

spherical aberration,球差

spherical phranometer,球形總日射表

spherical phrgeometer,球形地球輻射表

spherical phrradiometer,球形全輻射表

spin axis,旋轉軸

spin decoupling,自旋去耦

spin test (of a current-meter),（流速計的）旋轉試驗

spinning magnetometer,旋轉磁力儀

spinning sidebands,旋轉邊帶

spin-sin coupling constant,（核磁共振）自旋﹛自旋耦合常數

spirit level,气泡式水准儀

split-body valve,分体閥

split core type current transformer,鉗式電流互感器

split range opoeration,分程操作

split-ranging,分程

split screen,分區屏幕

split stream injector,分流進樣器

splitter,分流器

spot radiation source,點輻射源

spot recorder,光點記錄儀

SPOT satellite,斯波特衛星

spot scanning,點掃描

spot size,目標尺寸

spray method,噴霧方法

spraying device,噴霧裝置

spring-loaded regulator,彈簧型自力式調節閥

spring-loaded variable-head flowmeter,彈性加載可變壓頭流量計

spring plate,彈簧盤

spring testing machine,彈簧試驗机

spurious echo,楔內反射波

spurious errors,疏忽誤差

square-edged orifice plate,直角邊緣孔板

square frame of magnetic needle,方框羅針

square profile (pressure) gaege,矩形壓力表

square-wave polarogyaph,方波极譜儀

stability,穩定性；穩定度

stability analysis,穩定性分析

stability condition,穩定（性）條件

stability criterion,穩定（性）判据；穩定（性）准則

stability error,穩定性誤差

stability limit,穩定（性）极限

stability margin,穩定裕度；穩定裕量

stability method,穩定法

stability of towed body,拖曳体穩定性

stability theory,穩定性理論

stabilizability,可穩性；能穩性

stabilization,鎮定；穩定

stabilized load characteristic,穩定負載特性

stabilized supply apparatus,穩定電源

stabilized voltage varistor,穩壓電壓敏電阻器

stabilizing network,鎮定网絡

stabilizing period,穩定過程

stable region,穩定域

stable system,穩定系統

stable type gravimeter,穩定型重力儀

stack,棧

stacking test,堆碼試驗

stadia line,視距線

stadia rod,視距尺

stadia wave gauge,視距測波儀

staff tide gauge,驗潮杆；水尺

stagnation pressure,滯止壓力

stain sync,應變同步

standard,標准

standard acceleration transducer,標准加速度傳感器

standard accelerometer,標准加速度計

standard buffer solution,標准緩衝溶液

standard calorimeter,標准型熱量計

standard capacitor,標准電容器

standard cell,標准電池

standard deviation of a single measurement in a series of measurments,測量列中單次測量的標准（偏）差

standard deviation of the arithmetic mean of a series of measurements,測量列算術平均值的標准（偏）差

standard deviation of weighted arithmetic mean,加權算術平均值的標准（偏）差