"deathwatch" in the noun sense
1. booklouse, book louse, deathwatch, Liposcelis divinatorius
minute wingless psocopterous insects injurious to books and papers
2. deathwatch beetle, deathwatch, Xestobium rufovillosum
bores through wood making a ticking sound popularly thought to presage death
Source: WordNet® (An amazing lexical database of English)
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