from
The Collaborative International Dictionary of English v.0.48
Hospitaler \Hos"pi*tal*er\, n. [Written also {hospitaller}.] [F.
hospitalier. See {Hospital}, and cf. {Hostler}.]
1. One residing in a hospital, for the purpose of receiving
the poor, the sick, and strangers.
[1913 Webster]
2. One of an order of knights who built a hospital at
Jerusalem for pilgrims, A. D. 1042. They were called
Knights of St. John of Jerusalem, and after the removal of
the order to Malta, Knights of Malta.
[1913 Webster] hospitalisation