1. At the scene of action
   - on-the-spot

See also: on-site

• fluorescein
• fluorescein isocyanate
• fluorescein isothiocyanate
• fluoresceine
• fluorescence
• fluorescence microscopy
• fluorescent
• fluorescent dye
• fluorescent fixture
• fluorescent lamp
• fluoridate
• fluoridation
• fluoride
• fluoridisation
• fluoridise
• fluoridization
• fluoridize
• fluorine
• fluorite
• fluoro-
• fluoroboric acid
• fluoroboride
• fluorocarbon
• fluorocarbon plastic
• fluorochrome