In a way that relates to the exact amounts of substances that are needed for a chemical reaction.
This word is used in science and chemistry to talk about how much of each thing is needed for a reaction to happen.
Examples:
The chemicals were mixed stoichiometrically.
She measured the ingredients stoichiometrically.
Stoichiometrically, we need twice as much of the first thing.
He poured the liquids together stoichiometrically.
The scientist carefully added the substances stoichiometrically.
The students stoichiometrically combined the elements in the lab.