gossamer
noun /ˈɡɒsəmə(r)/
  /ˈɡɑːsəmər/
[uncountable]- the very fine thread made by spiders
 - (literary) any very light fine material
- a gown of gossamer silk
 - the gossamer wings of a dragonfly
 
 
Word OriginMiddle English: apparently from goose + summer, perhaps from the time of year around St Martin's summer, i.e. early November, when geese were eaten (gossamer being common then).