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An example use of kernel in a speech by a native speaker of american english:

“… is called the kernel the second part was …”

**noun:**

- For a given function (especially a linear map between vector spaces), the set of elements in the domain which are mapped to zero; (formally) given f : X → Y, the set {x ∈ X : f(x) = 0}.
- The human clitoris.
- A function used to define an integral transform.
- A set of pairs of a mapping's domain which are mapped to the same value.
- The core, center, or essence of an object or system.
- The core engine of any complex software system.
- The central (usually edible) part of a nut, especially once the hard shell has been removed.
- For a category with zero morphisms: the equalizer of a given morphism and the zero morphism which is parallel to that given morphism.
- A single seed or grain, especially of corn or wheat.
- The nucleus and electrons of an atom excluding its valence electrons.
- A small mass around which other matter is concreted; a nucleus; a concretion or hard lump in the flesh.
- The stone of certain fruits, such as peaches or plums.
- The central part of many computer operating systems which manages the system's resources and the communication between hardware and software components.
- The set of members of a fuzzy set that are fully included (i.e., whose grade of membership is 1).