so thin as to transmit light; "a hat with a diaphanous veil"; "filmy wings of a moth"; "gauzy clouds of dandelion down"; "gossamer cobwebs"; "sheer silk stockings"; "transparent chiffon"; "vaporous silks"
Diaphanous cloth is very thin and almost transparent. a diaphanous dress of pale gold. diaphanous cloth is so thin that you can almost see through it (diaphanus, from diaphainein )