fuel cell

Short definition from Wiktionary

Noun

1. 1
   An electrochemical device in which the intrinsic chemical free energy of fuel and oxidant is catalytically converted to direct current energy.
2. 2
   Synonym of fuel tank: A fuel storage tank.
3. 3
   Synonym of fuel tank: A fuel storage tank: A fuel tank with a flexible inner liner to reduce the risk of puncture.