Precursor or Precursors may refer to: Precursor (religion), a forerunner, predecessor The Precursor, John the Baptist
Science and technology Precursor (bird), hypothesized genus of fossil birds that was composed of fossilized parts of unrelated animals Precursor (chemistry), compound that participates in the chemical reaction that produces another compound Precursor (physics), phenomenon of wave patterns caused by the dispersion of an impulse's frequency components as it propagates through a medium Precursor in the course of a disease, the state preceding a particular stage in that course Precursor cell (biology), a unipotent stem cell Earthquake precursor, phenomenon that occurs before an earthquake and allegedly -though, so far, not demonstrably- can predict the earthquake Gehrlein Precursor, a glider LNWR Precursor Class (disambiguation), classes of passenger locomotives developed for the London and North Western Railway
Fiction Precursor race, any hypothetical alien civilization, in science fiction, fantasy, or horror fiction, which supposedly inhabited the Earth before the earliest human civilizations Precursors in the Halo series, extremely advanced race that preceded and were destroyed by The Forerunners Precursor, novel set in C. J. Cherryh's Foreigner universe (1999) Precursors, fictional race (said to now be extinct) of ancient beings in the board game Cosmic Encounter Precursors, fictional alien race in the Star Control video game series Precursors, fictional race of ancient beings in the Jak and Daxter video game series Precursors, fictional alien race in the video game Galactic Civilizations II: Dread Lords Precursors, fictional alien race, said to now be almost extinct, which supposedly created humanity in the Assassin's Creed video game series Precursors, fictional and extremely advanced alien race in the video game Subnautica. Precursors, fictional, evil alien race that created the Kaiju in the movie Pacific Rim and its sequel Pacific Rim: Uprising
Other uses Precursors of film The Precursors (video game), a video game from Kyiv-based developer Deep Shadows