Definition of platycnemia in US English:

platycnemia

(also platyknemia)

noun

Anthropology
  • 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.

Pronunciation

platycnemia

/ˌplatɪˈ(k)niːmɪə/