bifacial

/baɪˈfeɪʃəl/
adjective
  1. Having two faces or sides; worked or flaked on both sides (especially of a stone tool).
    • The bifacial design of the knife made it sharp on both edges.
    • Bifacial tools were a major advancement in prehistoric technology.
    • Archaeologists classify this artifact as a bifacial point.
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What does "bifacial" mean? | whatsthatwordmean | whatsthatwordmean