The difference between Catalyst and Stimulus
When used as nouns, catalyst means a substance that increases the rate of a chemical reaction without being consumed in the process, whereas stimulus means any external phenomenon that has an influence on a system, by triggering or modifying an internal phenomenon.
check bellow for the other definitions of Catalyst and Stimulus
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Catalyst as a noun (chemistry):
A substance that increases the rate of a chemical reaction without being consumed in the process.
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Catalyst as a noun:
Someone or something that encourages progress or change.
Examples:
"Economic development and integration are working as a catalyst for peace."
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Catalyst as a noun (literature):
An inciting incident that sets the successive conflict into motion.
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Catalyst as a noun (automotive):
A catalytic converter.
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Stimulus as a noun:
Any external phenomenon that has an influence on a system, by triggering or modifying an internal phenomenon.
Examples:
"an economic stimulus"
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Stimulus as a noun (physiology):
Something external that elicits or influences a physiological or psychological activity or response.
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Stimulus as a noun (psychology):
Anything effectively impinging upon any of the sensory apparatuses of a living organism, including physical phenomena both internal and external to the body.
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Stimulus as a noun:
Anything that induces a person to take action.