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biface

biface Archæol.
  (ˈbaɪfeɪs)
  [f. bi-2 + face n.]
  A type of prehistoric stone implement flaked on both faces. Also attrib.

1934 A. C. Haddon Hist. Anthropol. vii. 89 Throughout all Africa a core-tool, or ‘biface’, is the oldest known technique, and the same applies to India; in Africa it developed from a chipped-pebble industry. 1937 Proc. Prehist. Soc. III. 15 The lower Palaeolithic industries may be roughly divided into two main groups:—biface cultures and flake cultures. 1946 F. E. Zeuner Dating the Past vi. 164 The bifaces are mostly made on flakes. 1953 J. Procházka tr. B. Hrozn{yacu}'s Anc. Hist. W. Asia, India & Crete iv. 12 The so-called flint flakes and more massive bifacial tools (‘bifaces’) have been uncovered in the early palaeolithic strata.

Oxford English Dictionary

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