IPA: /nɒnˈɪntɪɡrəl/
KK: /nɑnˈɪntɪɡrəl/
Not forming a necessary part of something; not essential or fundamental.
The nonintegral components of the machine can be replaced easily without affecting its overall function.
Nonintegral → It is formed from "non-" (meaning not) and "integral" (from Latin "integralis", meaning whole or complete). The word "nonintegral" means not whole or not complete.
Think of 'not' ('non-') and 'whole' ('integral') to remember that 'nonintegral' refers to something that is not whole.