val·e·tu·di·nar·i·an 
(văl′ĭ-td′n-ârē-ən, -tyd′-)
(văl′ĭ-td′n-ârē-ən, -tyd′-)n.
A sickly or weak person, especially one who is constantly and morbidly concerned with his or her health.
adj.
1. Chronically ailing; sickly.
2. Constantly and morbidly concerned with one's health.
[From Latin valētūdinārius, from valētūdō, valētūdin-, state of health, from valēre, to be strong or well; see wal- in the Appendix of Indo-European roots.]
val′e·tu′di·nari·an·ism n.