Unifacial

• (a.) Having but one front surface; as, some foliaceous corals are unifacial, the polyp mouths being confined to one surface.
Found on http://thinkexist.com/dictionary/meaning/unifacial/

unifacial

adjective having but one principal or specialized surface; `a primitive unifacial flint tool`
Found on https://www.encyclo.co.uk/local/20974

unifacial

[adj] - having but one principal or specialized surface
Found on http://www.webdictionary.co.uk/definition.php?query=unifacial
No exact match found