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Protoplanet vs Undefined - What's the difference?

protoplanet | undefined |

As a noun protoplanet

is an astronomical object, approximately the size of the moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets.

As an adjective undefined is

lacking a definition or value.

protoplanet

English

Noun

(wikipedia protoplanet) (en noun)
  • An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets

    • Derived terms

    * protoplanetary

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined