Late 19th century; earliest use found in Journal of the Royal Anthropological Institute. From platy- + ancient Greek κνήμη tibia + -y, perhaps after French platycnémie.
Definition of platycnemy in US English:
platycnemy
nounˌplatɪˈ(k)niːmi
Anthropology
= platycnemia.
Origin
Late 19th century; earliest use found in Journal of the Royal Anthropological Institute. From platy- + ancient Greek κνήμη tibia + -y, perhaps after French platycnémie.