A rare or archaic term relating to expenditure or the laying out of expense.
From Greek 'expen-' (related to spending/expense) combined with '-thesis' (Greek suffix meaning placement or position, as in hypothesis, thesis). This appears to be a highly specialized or obsolete medical/philosophical term.
This word is so obscure it barely appears in modern dictionaries—it's the kind of term scholars encounter in medieval texts about logic or natural philosophy. It reminds us that English's full vocabulary is far larger than what anyone actually uses.
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