tombstones

noun
  1. 1

    A headstone marking a person's grave.

  2. 2

    The symbol "โˆŽ" marking the end of a proof.

    syn:halmos
  3. 3

    A marker that takes the place of deleted data, allowing for replication of the deletion across servers etc.

  4. 4

    A crashdump.

  5. 5

    An unusual morphological feature on an electrocardiogram indicative of acute myocardial infarction, characterized by a massive ST elevation.

Source: https://en.wiktionary.org/wiki/tombstone, https://en.wiktionary.org/wiki/tombstones