Biohazard
A biohazard was something that was dangerous to organic matter.

One of the cargo containers in cargo module 4 aboard the  was labeled as biohazard. ()

 featured a bio-hazard locker for the storage of such matter in cargo bay one. ()

Plasma coolant was considered a biohazard because it would react violently with organic matter, liquefying it on contact. ()

In 2376, Harry Kim commented that a dirty plate left in the s replicator was a biohazard. ()

See also 
 Level 3 biohazard containment field

External link 
 

de:Biogefährdung
Alerts
Biology
Deleted and unused material in background
Poisonous substances