The practice of divining the future or gaining knowledge by observing laughter and the way people laugh.
From Greek 'gelos' (laughter) + 'skopein' (to observe). Combined in the 19th century to describe a pseudoscientific divination method based on laughter analysis.
This word represents a lost pseudoscience—people once believed they could predict your future just by watching how you laugh! It's a reminder that not all scientific-sounding ideas from history actually work, but the word itself reveals how creative people were in inventing new 'sciences' with Greek roots.
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