- necessary for completeness; essential: an
*integral*part - whole or complete
- made up of parts forming a whole
- Math.
- of or having to do with an integer or integers; not fractional
- of or having to do with integrals or integration

Origin of integral

Late Latin*integralis*from Classical Latin

*integer*: see integer

- a whole
- Math.
- the result of integrating a fraction
- a solution of a differential equation