platycnemia
/ˌplatɪˈ(k)niːmɪə/(also platyknemia) Physical Anthropol.
noun
Flatness of the tibia; the condition of a tibia (often a fossil tibia) in which the anteroposterior diameter of the shaft is unusually small relative to the corresponding transverse diameter.
Origin
Late 19th century. From platy- + ancient Greek κνήμη tibia + -ia, after French platycnémie.