In science, notation refers to the use of superscripts, subscripts, hats, daggers, brackets, and or marks, etc., often affixed to letters or symbols, generally done to signify something specific, such as a variable, constant, or condition, typically as a means of shorthand.
Further reading ● Bryan, George H. (1907). Thermodynamics (§notation, pgs. xi-xiv). B.G. Teubner. ● Anderson, Gregor M. (2005). Thermodynamics of Natural Systems (§2.6.4: Notation, pgs. 27-28). Cambridge University Press.