Valetudinarian

Part of speech: noun (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.

Part of speech: adjective (a.)

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.