Definition
A chemical agent that kills bacteria. In aviation, bactericides are added to jet fuel to prevent the growth of microorganisms that can live at the interface between water and fuel in storage tanks, where they can clog filters, corrode tank walls, and contaminate the fuel system.
Plain English
A substance that kills bacteria. In aviation it is mixed into jet fuel to stop tiny organisms from growing inside fuel tanks.
Context Anchor
Seen in aircraft maintenance, fuel servicing, and contamination-control discussions.
Derivation
From Latin 'bacterium' (small rod, referring to the shape of early-discovered bacteria) and '-cide' from Latin 'caedere' meaning 'to kill.' Literally 'bacteria killer.' Knowing the '-cide' ending helps recognise related words like pesticide and fungicide.
Why Pilots Care
Added to aviation fuel to stop bacteria from forming sludge and corrosion that can clog filters and damage engines.
Intuition Check
A bactericide is not just any cleaner. It specifically kills bacteria; it may not kill every kind of germ, fungus, or contaminant unless it is approved for that purpose.
Example Sentence 1
A bactericide was added to the jet fuel to prevent microbial growth in the wing tanks.
Example Sentence 2
Routine addition of bactericide keeps microbial growth from developing in the aircraft's fuel system.