araneous

from The Century Dictionary.

• . Full of cobwebs.
• Resembling a cobweb; extremely thin and delicate, like spider's silk or gossamer; covered with delicate tangled hairs like cobweb; arachnoid.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Cobweblike; extremely thin and delicate, like a cobweb. See arachnoid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Extremely thin and delicate, like a cobweb.