What is "felt grain"

Felt \Felt\, n. [AS. felt; akin to D. vilt, G. filz, and possibly to Gr. ? hair or wool wrought into felt, L. pilus hair, pileus a felt cap or hat.]

1. A cloth or stuff made of matted fibers of wool, or wool and fur, fulled or wrought into a compact substance by rolling and pressure, with lees or size, without spinning or weaving.

   It were a delicate stratagem to shoe A troop of horse with felt.
   --Shak.

2. A hat made of felt.
   --Thynne.

3. A skin or hide; a fell; a pelt. [Obs.]

   To know whether sheep are sound or not, see that the felt be loose.
   --Mortimer.

   Felt grain, the grain of timber which is transverse to the annular rings or plates; the direction of the medullary rays in oak and some other timber.
   --Knight.

n. The grain of timber which is transverse to the annular rings or plates; the direction of the medullary rays in oak and some other timbers.