In mathematics and logic, an element or set that opposes or negates the complement of another set.
From 'anti-' (opposite) plus 'complement' from Latin 'complementum' meaning 'something that completes.' This is a specialized mathematical or logical term.
In formal logic, anticomplement shows how elegant mathematical language can be—once you understand complements, anticomplement is just the logical opposite, but the term sounds mysterious if you don't know the concept.
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