Kernel definitions

kûr'nəl
A grain or seed, as of corn, wheat, etc.
noun
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The inner, softer part of a nut, fruit pit, etc.
noun
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The central, most important part of something; core; essence.
noun
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To enclose as a kernel.
verb
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A grain or seed, as of a cereal grass, enclosed in a husk.
noun
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2
The usually edible seed inside the hard covering of a nut or fruit stone.
noun
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A grain or seed, as of a cereal grass, enclosed in a husk.
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The inner, usually edible seed of a nut or fruit stone.
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The core, center, or essence of an object or system.

The kernel of an argument.

noun
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(US) The stone of certain fruits, such as peaches or plums.
noun
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The definition of a kernel is a grain or seed, or the most important part of something.

An example of a kernel is one uncooked piece of corn.

An example of a kernel is the core of ones religious beliefs.

noun
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1
The central (usually edible) part of a nut, especially once the hard shell has been removed.
noun
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A small mass around which other matter is concreted; a nucleus; a concretion or hard lump in the flesh.
noun
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The core of a computer operating system (OS).The kernel resides in memory and performs basic tasks such as managing internal memory, input and output operations, and peripheral devices.A kernel also is responsible for launching applications and allocating associated system resources such as processor time. See also OS.
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A single seed or grain, especially of corn or wheat.
noun
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(computing) The central part of many computer operating systems which manages the system's resources and the communication between hardware and software components.
noun
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The heart or essential component of any operating system. When computer users say something like, “Oh no, my computer crashed!” what they are really saying is, “Oh, no, my kernel has crashed!” The primary function of the kernel is to coordinate different parts of the operating system—the disk drive, access to memory, the programs and processes, input/output devices such as the mouse and the keyboard, as well as networking.
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(calculus) A function used to define an integral transform.

The Dirichlet kernel convolved with a function yields its Fourier series approximation.

noun
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(mathematics) A set of pairs of a mapping's domain which are mapped to the same value.
noun
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(mathematics, algebra) Those elements, in the domain of a function, which the function maps to zero.

If a function is continuous then its kernel is a closed set.

noun
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(mathematics, fuzzy set theory) The set of members of a fuzzy set that are fully included (i.e., whose grade of membership is 1).
noun
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The central or most important part; the core.
noun
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1
A small amount of something, especially when potentially developing into something else.

Detected a kernel of anger in his remarks.

noun
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The nucleus of an operating system. It is the closest part to the machine level and may activate the hardware directly or interface to another software layer that drives the hardware. The kernel orchestrates the entire operation of the computer by slicing time for each system function and each application as well as managing all the computer's resources. It typically resides in memory at all times. See microkernel, monolithic kernel, kernel space and kernel panic.
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Origin of kernel

From Middle English kernel, kirnel, kürnel, from Old English cyrnel, from Proto-Germanic *kurnilaz, diminutive of *kurną (“seed, grain, corn”), equivalent to corn +‎ -le. Cognate with Middle Dutch kernel, cornel, Middle High German kornel. Related also to Old Norse kjarni (“kernel”).