fuel cell. (physical chemistry). An electrochemical device in which the reaction between a fuel, such as hydrogen, and an oxidant, such as oxygen or air, converts the chemical energy of the fuel directly into electrical energy without combustion.
The word 'soup' is a noun, a common, concrete noun; a word for a thing. The word 'soup' also functions informally as a verb for the term to 'soup up', to change something inâ¦ order to make it faster or more powerful or effective. 2 people found this useful.
The noun food is an uncountable and a countable noun, depending on use. The noun food and some of the words for food, such as rice, sugar, butter, or meat are words for subst â¦ ances, uncountable nouns.he noun meat is an uncountable  noun as a word for a substance.    Units of meat are expressed as pieces of meat, cuts of meaat,  pounds of meat, etc.    For â¦ example, in a restaurant you might ask for some meat,  but not 'a' meat, which means one meat.