- equation⇄equation, noun.
1. a statement of equality between two quantities, indicated by using the equal sign (=) between them. (Examples:) 4 + 5 = 9. (4 X 8) + 12 = 44.
2. an expression using chemical formulas and symbols to show quantitatively the s - equation⇄exponential curve orequation
a curve or an equation depending on an exponential function.