D defs.my
Entry 2 senses Webster, 1913

Deathwatch

/dĕth'-wächˌ/ · Death·watch · IPA /ˈdɛθwɒtʃ/
01 n. A small beetle (Anobium tessellatum and other allied species). By forcibly striking its head against woodwork it makes a ticking sound, whi…
  1. 1.
    A small beetle (Anobium tessellatum and other allied species). By forcibly striking its head against woodwork it makes a ticking sound, which is a call of the sexes to each other, but has been imagined by superstitious people to presage death.(Zool.)
    “She is always seeing apparitions and hearing deathwatches.” Addison.
    “I did not hear the dog howl, mother, or the deathwatch beat.” Tennyson.
  2. 2.
    The guard set over a criminal before his execution.