In mathematics and logic, a statement or proposition that remains to be demonstrated or proved; something that must be shown.
From Latin demonstrandum, neuter gerundive of demonstrare (to show), meaning literally 'something to be shown.' Common in mathematical proofs, often abbreviated as QED or with the symbol at the end.
Mathematicians use Latin because math needed a universal language—'demonstrandum' means 'what has to be shown,' and when you write QED at the end of a proof, you're saying 'that which was to be demonstrated has been proven'—talk about ancient efficiency!
Complete word intelligence in one call. Free tier — 50 lookups/day.