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outer core is not in our dictionary (yet). Here's what it could mean:

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noun

  • The fluid layer of a planet's interior, composed primarily of iron and nickel, situated between the solid inner core and the mantle.

Example Sentences

Examples are provided to illustrate usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Scientists link this unusual behavior to patterns in the magnetic field at the boundary between Earth's liquid outer core and its solid mantle.

From Science Daily ● Feb. 25, 2026

But a new study has found that its edges are softer than realized and actually changing shape as they press against the liquid iron and nickel in Earth’s outer core.

From Los Angeles Times ● Feb. 11, 2025

Thesaurus

Possible Synonyms

  • liquid core layer
  • sub-mantle fluid
  • geodynamo region

Possible Antonyms

Words in our thesaurus

other words

  • surface layer
  • lithosphere
  • solid core
  • inner core

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