diaphanous

Adjective

Synonyms: filmy gauzy gauze-like gossamer see-through sheer transparent vaporous vapourous cobwebby

WordNet 3.0

Adjective (1)

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”Synonyms: filmy gauzy gauze-like gossamer see-through sheer transparent vaporous vapourous cobwebby

Webster's Dictionary (GCIDE)

Diaphanous \Di*aph"a*nous\, a. [Gr. ?, fr. ? to show or shine through; dia` through + ? to show, and in the passive, to shine: cf. F. diaphane. See Phantom, and cf. Diaphane, Diaphanic.] Allowing light to pass through, as porcelain; translucent or transparent; pellucid; clear. [1913 Webster]

Another cloud in the region of them, light enough to be fantastic and diaphanous. --Landor. [1913 Webster]