biface

n.

（旧石器时代的）两面器（即两面加工的一种石块，为手斧的雏型）；

BiFace
The Three Sides of a Biface
Dispositif d'affichage biface
Effects of raw materials on biface manufacture.
The Basics of Biface Knapping: A Manual for Flint Knappers and Lithic Analysis
On the Significance of Acheulean Biface Variability in Southern Britain.
THE BASICS OF BIFACE KNAPPING IN THE EASTERN FLUTED POINT TRADITION: A MANUAL FOR FLINTKNAPPERS AND LITHIC ANALYSTS
The First Acheulian Quarry in India: Stone Tool Manufacture, Biface Morphology, and Behaviors
The basics of biface knapping in the eastern fluted point tradition: a manual for flintworkers and lithic analysts [Reprinted 1990, ...
Clovis Technology and Settlement in the American Southeast: Using Biface Analysis to Evaluate Dispersal Models