inner core
Earth's solid middle
The inner core is the centermost part of a layered structure.
In geology, it's Earth's solid iron-nickel center, surrounded by the liquid outer core.
Figuratively, inner core describes the essential or most private part of something: the inner core of her beliefs, the party's inner core of advisors.
The phrase suggests what remains when outer layers are stripped away.
Firm matter state
- nickelElement twenty-eight, or coin
- ironElement twenty-six
- crystallineClear, ordered, brilliant
- spherePerfectly round solid
boundary · P-wave · seismic · dense · pressure · temperature · radius · anisotropy
Seismic ground movement
- seismographEarthquake measuring device
- P-waveLongitudinal seismic wave
- S-waveTransverse seismic vibration
- shadow zoneSeismic wave reception void
velocity · attenuation · anisotropy · travel time · seismometer · tomography · reflection · refraction
Transferred thermal energy
- radioactiveEmitting nuclear decay particles
- decayGradual organic breakdown
- geothermalRelating to underground heat
- temperatureMeasured heat intensity
conduction · cooling · solidification · latent heat · heat flow · freezing · crystallization · energy source
Two-metal metallic alloy
- ferrousRelating to iron
- metallicResembling ore-based elements
- alloyMetallic combination
- crystallineClear, ordered, brilliant
hexagonal · sulfur · silicon · oxygen · hydrogen · dense · phase · atomic structure
Our world
- terrestrialRelating to land
- centralIn the middle, primary
- sphericalGlobe-like in form
- mantleCovering or wrap
crust · differentiation · accretion · primordial · planetary formation
solid
Firm matter state
- nickelElement twenty-eight, or coin
- ironElement twenty-six
- crystallineClear, ordered, brilliant
sphere · boundary · P-wave · seismic · dense · pressure · temperature · radius · anisotropy · rotation
earthquake
Seismic ground movement
- seismographEarthquake measuring device
- P-waveLongitudinal seismic wave
- S-waveTransverse seismic vibration
shadow zone · velocity · attenuation · anisotropy · travel time · seismometer · tomography · reflection · refraction · detection
heat
Transferred thermal energy
- radioactiveEmitting nuclear decay particles
- decayGradual organic breakdown
- geothermalRelating to underground heat
temperature · conduction · cooling · solidification · latent heat · heat flow · freezing · crystallization · energy source
iron-nickel
Two-metal metallic alloy
crystalline · hexagonal · sulfur · silicon · oxygen · hydrogen · dense · phase · atomic structure · lattice
Earth
Our world
- terrestrialRelating to land
- centralIn the middle, primary
- sphericalGlobe-like in form
mantle · crust · differentiation · accretion · primordial · planetary formation
- planetary cores
- Coresnucleus, kernel, center
- Earth's coreiron, nickel
- Earth's interiorcrust, mantle, lithosphere, asthenosphere, layers
- essenceessence, quintessence, substance, gist, crux
- core elementsiron, nickel, molten iron, sulfur, oxygen
inner corecrust
Hard outer layer
outer core · surface · mantle · lithosphere · oceanic crust
inner coreouter layer
Outermost covering surface
outermost layer · periphery · exterior · surface · outer edge