Assertion: boomerang's shape | /r/Synonym | bannerstone
Facets:
value: commonly
type: TEMPORAL
Source sentences:
text: Based on previous work done by William S. Webb, William R. Perkins claims that spear-thrower weights, commonly called "bannerstones", and characterized by a centered hole in a symmetrically shaped carved or ground stone, shaped wide and flat with a drilled hole and thus a little like a large wingnut, are an improvement to the design that created a silencing effect when swung.