n. & adj.
n. 1 a filmy substance of small spiders' webs. 2 delicate filmy material. 3 a thread of gossamer.
adj. light and flimsy as gossamer. gossamered adj. gossamery adj.
[ ME gos(e)somer(e), app. f. GOOSE + SUMMER(1) (goose summer = St Martin's summer, i.e. early November when geese were eaten, gossamer being common then) ]