Delta

In Modern Greek it is pronounced Voiced Dental Fricative , (like the th in the English word ''th''is) but in the Ancient Greek language, it was pronounced Voiced Dental Plosive .

A River Delta is named after the letter delta because it has roughly the triangular shape of the upper-case delta.

The upper-case letter Δ is used as the symbol for:

The Difference Operator , affecting a change or difference between mathematical values:

{y_2-y_1\over x_2-x_1} = {\Delta y \over \Delta x}

The Laplace Operator :

\Delta f = rac {\partial^2 f}{(\partial x)^2} + rac {\partial^2 f}{(\partial y)^2}

A Macroscopic Change in the value of a variable in mathematics or science.

Any of the Delta Particles in particle physics.

The lower-case letter δ is used as the symbol for:

A Microscopic Change in the value of a variable in mathematics or science.

An auxiliary function in Calculus used to rigorously define the Limit or Continuity of a given function.

The Kronecker Delta in mathematics.

The Dirac Delta Function in mathematics.

Deflection in engineering mechanics

A mark for deletion in Proofreading . The usage is said to date back to classical times.

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Delta