only 1 use
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Definitionan enthusiastic expression of feelings or thoughts
something flowing or given off (often a liquid or gas under pressure such as blood or leaking gas)
- These visions faded when I perused, for the first time, those poets whose effusions entranced my soul and lifted it to heaven.Introductory Letters (12% in)
There are no more uses of "effusion" in Frankenstein.
Typical Usage (best examples)