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 ;