kneebrush

from The Century Dictionary.

• noun In zoology: The brush or tuft of hair on the knees of some antelopes.
• noun The mass of thick-set hairs on the legs of bees, by means of which they carry polleu from one plant to another or to their hive.

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

• noun (Zoöl.) A tuft or brush of hair on the knees of some species of antelopes and other animals; -- chiefly used in the plural.
• noun (Zoöl.) A thick mass or collection of hairs on the legs of bees, by aid of which they carry the collected pollen to the hive or nest; -- usually in the plural.