Definition of "bifacial" []

• Having two faces, fronts, or façades. (adjective)
• Having two opposing surfaces that are alike. (adjective)
• Archaeology Flaked in such a way as to produce a cutting edge that is sharp on both sides. Used of a stone tool. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The company says the cells are less than 50 microns, or less than two-thousandths of an inch, making them the thinnest in production, and bifacial, meaning they can capture sun energy from both faces."
• "The Mahaffy Cache consists of 83 stone implements ranging from salad plate-sized, elegantly crafted bifacial knives and a unique tool resembling a double-bitted ax to small blades and flint scraps."
• "Besides the ochre, some of the more spectacular finds at the cave over the past few years include the oldest known and dated bone tools in the world; the earliest known evidence for fishing in the world; and highly sophisticated bifacial spearheads or points made in fine-grained stone."