The Collaborative International Dictionary of English v.0.48:

Deinotherium \Dei`no*the"ri*um\
   (d[imac]`n[-o]*th[=e]"r[i^]*[u^]m), n. [NL.] (Paleon.)
   See Dinotherium.
   [1913 Webster]

The Devil's Dictionary (1881-1906):

DEINOTHERIUM, n.  An extinct pachyderm that flourished when the
Pterodactyl was in fashion.  The latter was a native of Ireland, its
name being pronounced Terry Dactyl or Peter O'Dactyl, as the man
pronouncing it may chance to have heard it spoken or seen it printed.