nos·o·co·mi·al 
(nŏs′ə-kōmē-əl)
(nŏs′ə-kōmē-əl)adj.
1. Of or relating to a hospital.
2. Relating to or being an infection that a patient acquires while being treated in a hospital.
[Late Latin nosocomium, hospital (from Greek nosokomeion, from nosokomein, to tend the sick : nosos, sickness, plague + komein, to take care of, tend) + -AL.]