MeSH definition : Any reptile including tortoises, fresh water, and marine species of the order Testudines
with a body encased in a bony or cartilaginous shell consisting of a top (carapace)
and a bottom (plastron) derived from the ribs.;
Any reptile including tortoises, fresh water, and marine species of the order Testudines
with a body encased in a bony or cartilaginous shell consisting of a top (carapace)
and a bottom (plastron) derived from the ribs.