The Collaborative International Dictionary
Unifacial \U`ni*fa"cial\, a. [Uni- + facial.] Having but one front surface; as, some foliaceous corals are unifacial, the polyp mouths being confined to one surface.
Wiktionary
a. 1 Having, or showing, a single face. 2 Having only one principal or specialized surface or edge. 3 cylindrical.
WordNet
adj. having but one principal or specialized surface; "a primitive unifacial flint tool"
Usage examples of "unifacial".
The Calico site has yielded many completely unifacial stone tools with uniform edge retouch.
Flake tools with unifacial, unidirectional chipping, like those found at Calico, are typical of the European eoliths.
De Mortillet, like modern authorities, believed that in almost all cases unifacial flaking is not the result of chance impacts but of deliberate work.
Mortillet included reproductions of some Thenay flints that displayed very regular unifacial retouching.
In his book Musee Prehistorique, de Mortillet included reproductions of some Thenay flints that displayed very regular unifacial retouching.