[Doctor Stochastic]

Most scientific terms do not have the same meaning as in informal usage. Examples: (from math) group, root, real, imaginary, complex, or, norm, regulator, conductor, derivative, differentiate, parameter, integrate, infinite, function; (from computer science) do, repeat, end, real, complex, function, parameter; (from football) flat, encroachment, down; (from music) pitch, score, slur, dominant, bass; (from physics) caustic, law, theory; (from tennis) love, fifteen, twenty, thirty, deuce.

[dubyagee]

group, root, real, imaginary, complex, or, norm, regulator, conductor, derivative, differentiate, parameter, integrate, infinite, function;

They all relate in some way to the informal usage.