Assertion: keel | /r/HasProperty | formed of one or more plates of iron
Facets:
value: in iron vessels
type: OTHER
Source sentences:
text: In iron vessels the keel is formed of one or more plates of iron, having a concave curve, or limber channel, along its upper surface.--To give the keel, is to careen.--Keel formerly meant a vessel; so many "keels struck the sands.