The Collaborative International Dictionary of English v.0.48:

Taedium \Tae"di*um\, n. [L.]
   See Tedium.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tedium \Te"di*um\, n. [L. taedium, fr. taedet it disgusts, it
   wearies one.]
   Irksomeness; wearisomeness; tediousness. [Written also
   taedium.] --Cowper.
   [1913 Webster]

         To relieve the tedium, he kept plying them with all
         manner of bams.                          --Prof.
                                                  Wilson.
   [1913 Webster]

         The tedium of his office reminded him more strongly of
         the willing scholar, and his thoughts were rambling.
                                                  --Dickens.
   [1913 Webster]