preplanetary

== English == === Alternative forms === pre-planetary === Etymology 1 === From pre- +‎ planetary. ==== Adjective ==== preplanetary (not comparable) Before the existence or formation of planets. ===== Related terms ===== ===== Translations ===== === Etymology 2 === From preplanetary nebula, from pre- + planetary nebula. ==== Adjective ==== preplanetary (not comparable) Relating to a stage in the life of a red giant star or its preplanetary nebula during the star's final stages of life ===== Related terms =====