Preplanetary

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Before the existence or formation of planets. not-comparable
  2. 2
    Relating to a stage in the life of a red giant star or its preplanetary nebula during the star's final stages of life not-comparable

Etymology

Etymology 1

From pre- + planetary.

Etymology 2

From preplanetary nebula, from pre- + planetary nebula.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.