gossamer

Origin

From Middle English gossomer, gosesomer, gossummer (attested since around 1300, and only in reference to webs or other light things), usually thought to derive from gos (“goose”) + somer (“summer”) and to have initially referred to a period of warm weather in late autumn when geese were eaten — compare Middle Scots goesomer, goe-summer (“summery weather in late autumn; St Martin's summer”) and dialectal English go-harvest, both later connected in folk-etymology to go — and to have been transferred to cobwebs because they were frequent then or because they were likened to goose-down.