neu·ro·hor·mone 
(nr′ō-hôrmōn, nyr′-)
(nr′ō-hôrmōn, nyr′-)n.
A hormone secreted by or acting on a part of the nervous system.
neu′ro·hor·monal adj.
- fourgon
- fourhanded
- Four-H Club
- Four Horsemen of the Apocalypse
- Four Hundred
- Fourier
- Fourier analysis
- Fourierism
- Fourierist
- Fourierite
- Fourier series
- Fourier transform
- four-in-hand
- four-leaf clover
- four-letter word
- four-o'clock
- four-peat
- fourpenny nail
- fourplex
- four-poster
- fourragère
- fourscore
- foursome
- foursquare
- foursquarely