O’er faded heath-flowers spun, or thorny furze,
The filmy Gossamer is lightly spread;
– Charlotte Smith, from Sonnet LXIII: The Gossamer
Gossamer is the thread-like spider web seen on plants and in fields, most noticably in late autumn. From Middle English, gos (goose) and summer. Originally it refered to the time of year, when geese were in season, then the meaning changed to what could be observed at that time. A related word is the Swedish sommartrad, ‘summer thread’.
(Image: Araignée du Soir… Espoir George Barbier, 1922)