You searched for: “variations
variation (s) (noun), variations (pl)
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variations
Partial changes in the form, position, state, or qualities of something; modifications; alternations; mutations; diversities; deviations.

". . . it was later realized that the phenomenon of changing air pressure had accounted for the variations in temperature readings in the open thermoscopes."

This entry is located in the following unit: Thermometer and Temperature Scales (page 1)