- pl. (see fish) -·fish·, -·fish·es any of various fishes of a silvery color, as the tarpon or silverside
- pl. -·fish· any of various families of primitive, wingless thysanuran insects with silvery scales, long feelers, and a bristly tail: they thrive in dampness and darkness and are often injurious to books and other paper products
nounpl. silverfish, or sil·ver·fish·es
- Any of various fishes having silvery scales, such as a tarpon or silverside.
- Any of various small wingless insects of the order Thysanura, having a silvery body and a three-pronged tail, especially Lepisma saccharina, which feeds on the starchy material in bookbindings, clothing, and food.
(plural silverfish or silverfishes)
- Lepisma saccharina, a small wingless insect with silvery scales, a type of bristletail.
- Other similar insects in the order Zygentoma, including:
- Ctenolepisma lineata, also called four-lined silverfish.
- Ctenolepisma longicaudata, or the grey silverfish.
- Megalops atlanticus, the Atlantic tarpon, the tarpum.
- The silver fish, Raiamas senegalensis.
- The Antarctic silverfish, Pleuragramma antarcticum.
- A white variety of the goldfish.