資料來源 : Webster's Revised Unabridged Dictionary (1913)
{Silky, or Silk-bark}, {oak}, an Australian tree ({Grevillea
robusta}).
{Green oak}, oak wood colored green by the growth of the
mycelium of certain fungi.
{Oak apple}, a large, smooth, round gall produced on the
leaves of the American red oak by a gallfly ({Cynips
confluens}). It is green and pulpy when young.
{Oak beauty} (Zo["o]l.), a British geometrid moth ({Biston
prodromaria}) whose larva feeds on the oak.
{Oak gall}, a gall found on the oak. See 2d {Gall}.
{Oak leather} (Bot.), the mycelium of a fungus which forms
leatherlike patches in the fissures of oak wood.
{Oak pruner}. (Zo["o]l.) See {Pruner}, the insect.
{Oak spangle}, a kind of gall produced on the oak by the
insect {Diplolepis lenticularis}.
{Oak wart}, a wartlike gall on the twigs of an oak.
{The Oaks}, one of the three great annual English horse races
(the Derby and St. Leger being the others). It was
instituted in 1779 by the Earl of Derby, and so called
from his estate.
{To sport one's oak}, to be ``not at home to visitors,''
signified by closing the outer (oaken) door of one's
rooms. [Cant, Eng. Univ.]