1. [n]  weak or sickly person especially one morbidly concerned with his or her health
2. [adj]  of or relating to or characteristic of a person who is a valetudinarian

VALETUDINARIAN is a 14 letter word that starts with V.

1. \Val`e*tu`di*na"ri*an\, a. [L. valetudinarius,
   from valetudo state of health, health, ill health, fr. valere
   to be strong or well: cf. F. val['e]tudinaire. See
   {Valiant}.]
   Of infirm health; seeking to recover health; sickly; weakly;
   infirm.
   
         My feeble health and valetudinarian stomach.
                                                  --Coleridge.
   
         The virtue which the world wants is a healthful virtue,
         not a valetudinarian virtue.             --Macaulay.
   
   

2. \Val`e*tu`di*na"ri*an\, n.
   A person of a weak or sickly constitution; one who is seeking
   to recover health.
   
         Valetudinarians must live where they can command and
         scold.                                   --Swift.