[L. aequare, to make equal]

1. The state of being equal.
2. In chemistry, a symbolic representation of a chemical reaction. The equation includes symbols for the involved elements and/or compounds, and their molar ratios. By convention, the input (reactants) are listed on the left, and the products of the reaction are placed on the right.
3. A description of a mathematical relation between two or more constants or variables.

Arrhenius equation

SEE: Arrhenius equation

equation of motion

A statement of the variables of pressure, volume, compliance, resistance, and flow for respiratory system mechanics.

Henderson-Hasselbalch equation

SEE: Henderson-Hasselbalch equation

personal equation

A personal bias or peculiarity that may explain a difference in approach or interpretation.