The Collaborative International Dictionary
Stoichiometrical
Stoichiometric \Stoi`chi*o*met"ric\, Stoichiometrical \Stoi`chi*o*met"ric*al\, a. Of or pertaining to stoichiometry; employed in, or obtained by, stoichiometry.
2. (Chem.) of, pertaining to, using, or consuming, reagents in the exact proportions required for a given reaction; as, a stoichiometric reaction, i. e., a reaction which goes to completion, rather than stopping partway at an equilibrium point.
Wiktionary
stoichiometrical
a. (alternative form of stoichiometric English)