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core

core

130 4.9
The central inside part of a physical object like the Earth
  • noun
  • /kɔr/
  • Specialized
translation icon : núcleo
  • The galactic core was too hot and dense to support normal stellar activity.
  • Earth's core
  • reactor core
  • solid inner core

It has an iron core, it has a rock exterior.

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Examples

  • Let's hold the core with a clamp so it doesn't fall apart.

  • The reactor core is overloading.

    Sonic the Hedgehog 3 (2024)

  • The whole core of Mars is ice.

    Total Recall (1990)

  • The inner core of the metal becomes superheated.

    Zack Snyder's Justice League (2021)

  • There could be a core meltdown in 33 minutes.

    Nuclear Hurricane (2007)

  • The two gray cylinders, representing the Earth's core, are made of iron, nickel, and chromium.

    Academic text (1999)

  • The scientists recorded the temperature of the Earth's core to understand its composition better.

  • During the test, the engineers monitored the reactor core closely to prevent any safety issues.

  • The core of the Earth is made up of solid iron and nickel, which contributes to its magnetic field.

Antonyms

exterior
124 3.1

The outside part of something, like the walls of a house

surface
3.4

On the outside or top layer of something

Idioms

to its core
4 5.6

In a way that changes someone or something very deeply and completely

rotten to the core
  • Offensive
4 8.1

Completely dishonest and morally bad in every part

Compounds

hard-core
11 6.5

Very loyal and dedicated to a group or cause

core group
10 3.5

A small group of people who are most important in a larger organization or activity

hard core
5 5.4

A small group of members who are very loyal and always support it

core strength
3 3.4

Strength in the muscles around your stomach and back that helps you stay steady and move

hard-core
3 7.5

Unwilling to change bad habits or beliefs

core drill
  • Specialized
1 6.1

A tool that cuts out a round piece from hard materials like concrete or rock

magnetic core
  • Archaic
1 8.6

A small ring in old computers that stores one piece of information

magnetic core memory
  • Archaic
1 8.3

A group of tiny magnetic rings used in old computers to store data

hard-core
  • Jargon
1 7.9

A game mode where death means permanent loss of progress

core bit
  • Specialized
7.8

A hollow cutting cylinder used in a drill to remove a sample of rock or concrete

core blower
  • Specialized
7.9

A machine that uses compressed air to pack sand into a box to make sand shapes for molds

core dump
  • Specialized
7.7

A file that shows what is in a computer's memory when a program crashes to help find errors

core histone
  • Specialized
8.3

A protein that DNA wraps around inside cells

core memory
  • Archaic
8.1

An old kind of computer storage that uses small magnetic rings to hold data

core memory
5.5

A very important thing someone remembers that shapes who they are and their choices

core shooter
  • Specialized
9.0

A machine that makes sand shapes for metal casting by blowing sand into a mold

core shooting machine
  • Specialized
9.7

A machine in a metal workshop that forces sand into a mould to make cores

demon core
  • Specialized
9.9

A small dangerous mass of radioactive metal used in early US tests that caused fatal accidents

How Central

core
  • Specialized
130 4.9
inner
3 2.8
interior
329 3.0
surface
3.4

Surface Forms

core singular
cores plural

Etymology

The word core comes from the Latin cor 'heart', so the Earth's core is like the planet's 'heart', the hot central part that helps control what happens on the surface.