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tombstone (EN)
съществително име

съществително име “tombstone”

ед. ч. tombstone, мн. ч. tombstones
  1. надгробна плоча
    The old cemetery was filled with tombstones, each bearing the name and dates of the person buried beneath.
  2. означава символа "∎", който се използва за обозначаване на края на доказателство в математиката.
    After carefully laying out each step of the theorem, the mathematician concluded the proof with a tombstone, signaling to readers that no further explanation was needed.