Meaning

noun a gauze fabric with an extremely fine texture

noun filaments from a web that was spun by a spider

adjective characterized by unusual lightness and delicacy

originFrom 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…

Etymology from Wiktionary, CC BY-SA 3.0