WordReference Random House Unabridged Dictionary of American English © 2026
del′ta func′tion, [Physics, Math.]
- Mathematics, Physicsa generalized function having the value 0 except at 0, the value infinity at 0, and an integral from minus infinity to plus infinity of 1, used in thermodynamics and quantum mechanics. Also called Dirac delta function.
'delta function' also found in these entries (note: many are not synonyms or translations):