yule \yule\ =ul, n. oe. yol, yoghol, as. ge'ol; akin to
   ge'ola december or january, icel. j=ol yule, ylir the
   name of a winter month, sw. jul christmas, dan. juul, goth.
   jiuleis november or december. cf. jolly.
   christmas or christmastide; the feast of the nativity of our
   savior.
   1913 webster

         and at each pause they kiss; was never seen such rule
         in any place but here, at bonfire, or at yule.
                                                  --drayton.
   1913 webster

   yule block, or yule log, a large log of wood formerly put
      on the hearth on christmas eve, as the foundation of the
      fire. it was brought in with much ceremony.

   yule clog, the yule log. --halliwell. w. irving.
      1913 webster
see also:
jolly yule block yule log yule clog 

yule log
     n : large log traditionally burned at christmas