1. A fire (usually on a hill or tower) that can be seen from a distance
   - beacon

Type of: visual signal

• flummery
• flummox
• flump
• flump down
• flunitrazepam
• flunk
• flunkey
• flunky
• fluor
• fluorapatite
• fluoresce
• fluorescein
• fluorescein isocyanate
• fluorescein isothiocyanate
• fluoresceine
• fluorescence
• fluorescence microscopy
• fluorescent
• fluorescent dye
• fluorescent fixture
• fluorescent lamp
• fluoridate
• fluoridation
• fluoride
• fluoridisation