DCHP-1 Online
beaver wool 
the fine fur close to the skin beneath the longer guard hairs, formerly, much prized by felt-makers for making beaver hats.
See also: beaver coat
- 1764 (1948) Once more the felt-makers petitioned . . . a new duty [be] laid upon the exportation of beaver skins and beaver wool unmanufactured.
- 1958 Then [in winter] the skin carries two kinds of fur; close to the skin is a thick mass of "beaver wool", down or "duvet" as the French called it; on top is a glossy fur of long "guard hairs."
- 1964 The pressure of hat manufacturers . . . was successful in securing . . . an export duty of . . . 1s, 6d. on every pound of beaver wool.
- 1764 (1948) Once more the felt-makers petitioned . . . a new duty [be] laid upon the exportation of beaver skins and beaver wool unmanufactured.