noun, verb — 20 senses
UK /ˈkɜː.nəl/ · US /ˈkɝ.nəl/
Etymology From Middle English kernel, kirnel, kürnel, from Old English cyrnel, from Proto-West Germanic *kurnil, diminutive of Proto-Germanic *kurną (“seed, grain, corn”), equivalent to corn + -le. Cognate with Yiddish קערנדל (kerndl), Middle Dutch kernel, cornel, Middle High German kornel. Related also to Old Norse kjarni (“kernel”).
The core, center, or essence of an object or system.
A small mass around which other matter is concreted; a nucleus; a concretion or hard lump in the flesh.
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences The central part of many computer operating systems which manages the system's resources and the communication between hardware and software components.
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences The core engine of any complex software system.
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences The simplified input to an algorithm that has undergone kernelization.
Calculus, Mathematics, Sciences A function used to define an integral transform.
Mathematics, Sciences, Set theory Of a function f The set of pairs of elements in the domain of f which are mapped to the same value; the equivalence relation x≡y⟺f(x)=f(y).
› The set of elements of the domain of f which…
Algebra, Group theory, Mathematics, Sciences Broadly, Of a group homomorphism f The set of elements of G which are mapped to the identity of H (usually written as 0 in an additive group and as 1 in a multiplicative group).
Of a morphism f between algebraic structures
Algebra, Mathematics, Sciences Broadly, Of a ring homomorphism f The set of elements of R which are mapped to the additive identity 0 of S.
Of a morphism f between algebraic structures
Algebra, Linear algebra, Mathematics, Sciences Broadly, Of a linear transformation f The set of elements of M which are mapped to the additive identity 0 of N.
Of a morphism f between algebraic structures
Category theory, Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences Of a morphism f The equalizer of f and the zero morphism from X to Y, denoted operatorname kerf.
Category theory, Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences Of a morphism f The source of operatorname kerf, denoted operatorname Kerf.
Mathematics, Sciences The set of members of a fuzzy set that are fully included (i.e., whose grade of membership is 1).
Fuzzy set theory
Slang The human clitoris.
Chemistry, Natural sciences, Physical sciences The nucleus and electrons of an atom excluding its valence electrons.
Etymology From Middle English kernel, kirnel, kürnel, from Old English cyrnel, from Proto-West Germanic *kurnil, diminutive of Proto-Germanic *kurną (“seed, grain, corn”), equivalent to corn + -le. Cognate with Yiddish קערנדל (kerndl), Middle Dutch kernel, cornel, Middle High German kornel. Related also to Old Norse kjarni (“kernel”).
To enclose within a kernel
To crenellate
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.