Assertion: barnacle's plate | /r/HasProperty | calcareous
Facets:
value: hard
type: DEGREE
Source sentences:
text: Typical acorn barnacles develop six hard calcareous plates to surround and protect their bodies.
text: It is made of 6 calcareous plates and usually circular in shape.
text: Barnacles are sessile crustaceans that secrete calcareous plates around their bodies for protection.
text: As adults, typical barnacles are covered with calcareous plates and are cemented, head down, to rocks, pilings, ships’ hulls, driftwood, or seaweed, or to the bodies of larger sea creatures, from clams to whales.