# Definition:Differential Equation/Solution/Historical Note

The original name for a solution to a differential equation that Jacob Bernoulli used in $1689$ was integral.
Leonhard Paul Euler used the term particular integral in his Institutiones Calculi Integralis of $1768$, but the latter term has more recently taken on a more precise definition.
The term solution was first used by Joseph Louis Lagrange in $1774$.