/'neɪpɑ:m; `ne,pɑm/
n [U] petrol in jellied form, used in making fire-bombs 凝固汽油（用以制造燃烧弹）.

n[U]
[Date: 1900-2000; Origin: naphthene a chemical compound (19-21 centuries) (from naphtha) + palmitate a chemical substance (19-21 centuries) (from French palme 'palm tree')]
a substance made from petrol that was used in bombs by US forces to burn fields and villages during the Vietnam war