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Adjective: prehuman  pree'hyoo-mun
  1. Existing or occurring before the emergence of anatomically modern humans, typically referring to the period before 300,000 years ago
    "Prehuman fossils provide insights into our evolutionary history"
Noun: prehuman  pree'hyoo-mun
  1. An ancestor or precursor of modern humans in the evolutionary lineage, such as early hominids or australopithecines
    "Australopithecus is considered a prehuman species"

Derived forms: prehumans