1. Noun

   true bristletail (any insect of order Thysanura, esp. of family Lepismatidae)

   Usually written using kana alone

2. Oriental silverfish (Ctenolepisma villosa)

   see 大和紙魚

3. someone who is unable to apply what they have read

   Derogatory

Also written 衣魚【しみ】shimi、蠧魚【しみ】shimi