Precursor

Precursor or Precursors may refer to:

• Precursor (religion), a forerunner, predecessor
  • The Precursor, John the Baptist

Science & technology

• Precursor cell (biology), a unipotent stem cell
• Gehrlein Precursor, a glider
• Precursor (chemistry), a compound that participates in the chemical reaction that produces another compound
• Precursor (physics), a phenomenon of wave propagation in dispersive media
• Earthquake precursor, a diagnostic phenomenon that can occur before an earthquake
• Precursor (bird), a hypothesized genus of fossil birds that was actually composed of fossilized parts of unrelated animals
• LNWR Whale Precursor Class, type of passenger locomotive developed for the London and North Western Railway
• A precursor in the course of a disease is a state preceding a particular stage in that course

Fiction

• Precursors Halo (series), an extremely advanced race that preceded and were destroyed by The Forerunners
• Precursor (novel), a 1999 novel set in C. J. Cherryh's Foreigner universe
• Precursors, a fictional race (now extinct) of ancient beings in the board game Cosmic Encounter
• Precursors, a fictional alien race in the Star Control video game series
• Precursors, a fictional race of ancient beings in the video game Jak and Daxter: The Precursor Legacy
• Precursors, a fictional alien race in Galactic Civilizations II: Dread Lords video game
• Precursors, a fictional,almost extinct alien race that supposedly created humanity in the Assassin's Creed series
• Precursors, a fictional, evil alien race that created the Kaiju in the movie Pacific Rim
• Precursor, a prefix for the fictional alien race, the Vex, in Destiny.

Other

• Precursors of film
• The Precursors (video game), a video game from Kiev-based developer Deep Shadows
• Precursor, a Half-Life 2: Episode Two Modification