The Collaborative International Dictionary of English v.0.48:

Valetudinary \Val`e*tu"di*na*ry\, a.
   Infirm; sickly; valetudinarian. -- Val`e*tu"di*na*ri*ness,
   n.
   [1913 Webster]

         It renders the habit of society dangerously
         valetudinary.                            --Burke.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Valetudinary \Val`e*tu"di*na*ry\, n.
   A valetudinarian.
   [1913 Webster]

WordNet (r) 3.0 (2006):

valetudinary
    adj 1: of or relating to or characteristic of a person who is a
           valetudinarian [syn: valetudinarian, valetudinary]