Depends entirely on the context, most letters is scientific formulae have multiple uses in different fields.
S is commonly use to denote distance or displacement in mechanics
s is the unit of time, seconds, but this is shown as a t in equations
S is used in physics and chemistry to show a change in entropy
S is also the letter of choice for the unit Siemens, a measure of electrical conductance.
6 letter word that ends in s and is a unit of measurement: ounces
R. S Turgel has written: 'Sampling techniques for electric power measurement' -- subject(s): Measurement, Electricity, Electric power
Possibly seconds.
Elliot S. Grossman has written: 'Comparative productivity dynamics' -- subject(s): Industrial productivity 'Company productivity measurement' -- subject(s): Industrial productivity, Measurement
Body height and weight are an example of an anthropometric measurement.
Henry B. Kerfoot has written: 'The use of industrial hygiene samplers for soil-gas measurement' -- subject(s): Soil pollution, Measurement 'Soil-gas measurement for detection of subsurface organic contamination' -- subject(s): Measurement, Soil air, Pollution
SI stands (in French) for Système international d'unités, the International System of Units [of measurement].
like 9.8m/s and little 2 above the S
Faizuddin Ahmed has written: 'Practices of proverty [sic] measurement and poverty profile of Bangladesh' -- subject(s): Consumption (Economics), Income, Measurement, Poverty, Statistics 'Practices of poverty measurement and poverty profile of Bangladesh' -- subject(s): Consumption (Economics), Income, Measurement, Poverty, Statistics
S. E. Wennemo-Hanssen has written: 'Measurement of thermal spectral indices in reactor cells near plane absorbers' -- subject(s): Measurement, Spectra, Thermal neutrons
Brian Dagnall has written: 'Measurement of crude oil cargoes' -- subject(s): Petroleum, Measurement
H. Galster has written: 'pH measurement' -- subject(s): Hydrogen-ion concentration, Measurement