say it: dahy-AF-uh-nis
diaphanous is an adjective meaning "so thin as to transmit light". It carries one recorded sense.
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”
Definitions, synonyms and semantic relations for diaphanous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.