Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cobwebby is an adjective meaning "so thin as to transmit light". It carries 2 recorded senses.
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”
covered with cobwebs
Definitions, synonyms and semantic relations for cobwebby come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.