Assertion: turtle's plastron | /r/HasProperty | hinged
Facets:
Source sentences:
text: Eastern box turtles have a high, dome-like carapace and a hinged plastron that allows total shell closure.
text: Unlike the latter species, the European pond turtle has a hinged plastron, although it is usually unable to close its shell completely.
text: When threatened, the turtle can retreat into its shell, as the plastron is hinged and can shut completely.