Definition of mesoplastron in US English:

mesoplastron

noun

Zoology
  • A dermal bone present in the plastron of certain turtles (including most extant pelomedusids).

Origin

Late 19th century. From meso- + plastron. Compare mesoplastral, and xiphiplastron, entoplastron, hyoplastron, hypoplastron.

Pronunciation

mesoplastron

/ˌmɛsə(ʊ)ˈplastr(ə)n/