|Origin:||peonier 'soldier', from peon, from Medieval Latin pedo; PAWN1|
someone who is important in the early development of something, and whose work or ideas are later developed by other people
John Whitney was a pioneer of computer animation.
He was a pioneer in the field of biotechnology.
one of the first people to travel to a new country or area and begin living there, farming etc:
the early pioneers of the Dakota territory