#clod__ball__glob__lump__clump__chunk  a compact mass; "a ball of mud caught him on the shoulder"
  supertype:  #agglomeration  a jumbled collection or mass
  subtype:  #clot__coagulum  a lump of material formed from the content of a liquid
     subtype:  #thrombus  a blood clot formed within a blood vessel and remaining attached to its place of origin
     subtype:  #embolus__embolu  an abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood
  subtype:  #gob  (British) a lump of slimey stuff; "a gob of phlegm"
  subtype:  #clew  a ball of yarn or cord or thread

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