>A sickly or weak person, especially one who is constantly and morbidly concerned with his or her health
>Showing undue concern about one’s health.
In Latin, “valetudo” refers to one’s state of health (whether good or bad)
Example
Every time he felt even a little bit sick, the valetudinarian would immediately look up his symptoms on WebMD and schedule a doctor’s appointment.
After visiting the emergency room for the third time in a week, his mother told him to stop being a valetudinarian and take some cold medicine.