Source : Webster's Revised Unabridged Dictionary (1913)

Webby \Web"by\, a.
   Of or pertaining to a web or webs; like a web; filled or
   covered with webs.

         Bats on their webby wings in darkness move. --Crabbe.

Source : WordNet®

webby
     adj : having open interstices or resembling a web [syn: {lacy}, {netlike},
            {netted}, {webbed}, {weblike}]
     [also: {webbiest}, {webbier}]