scopula

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A dense brushlike tuft of hairs, as on the feet of certain spiders and insects.
• noun A ciliated structure by which certain protozoans attach to a surface.

from The Century Dictionary.

• noun In entomology:
• noun A small scopa or brush-like organ.
• noun [capitalized] A genus of pyralid moths.
• noun In sponges, a fork- or broom-shaped spicule, consisting of a long axial shaft to the distal end of which generally four slender rays are attached.

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

• noun A peculiar brushlike organ found on the foot of spiders and used in the construction of the web.
• noun A special tuft of hairs on the leg of a bee.

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

• noun A dense tuft of hair, as on certain insects legs