1. Coextensive with the order Gymnophiona: legless amphibians
   - Caeciliidae, family Caeciliidae, family Caeciliadae

Type of: amphibian family

Part of: Gymnophiona, order Gymnophiona

• fast lane
• Fast of Ab
• Fast of Av
• Fast of Esther
• Fast of Gedaliah
• Fast of Tammuz
• Fast of Tevet
• Fast of the Firstborn
• fast one
• fast reactor
• fast time scale
• fast track
• fast-breaking
• fast-flying
• fast-footed
• fast-growing
• fast-paced
• fast-talk
• fastback
• fastball
• fasten
• fasten on
• fastened
• fastener
• fastening