The Collaborative International Dictionary of English v.0.48:

Graybeard \Gray"beard`\, n.
   An old man. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bellarmine \Bel"lar*mine\, n.
   A stoneware jug of a pattern originated in the neighborhood
   of Cologne, Germany, in the 16th century. It has a bearded
   face or mask supposed to represent Cardinal Bellarmine, a
   leader in the Roman Catholic Counter Reformation, following
   the Reformation; -- called also graybeard, longbeard.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

graybeard
    n 1: a man who is very old [syn: old man, greybeard,
         graybeard, Methuselah]