feath·er·brain 
(fĕthər-brān′)
(fĕthər-brān′)n.
A silly, flighty, or empty-headed person.
feather·brained′ adj.
- neural plate
- neural tube
- neural tube defect
- neuraminidase
- neurasthenia
- neurasthenic
- neurasthenically
- neurectomy
- neurilemma
- neurilemmal
- neuristor
- neuritic
- neuritis
- neuro-
- neuroanatomical
- neuroanatomist
- neuroanatomy
- neurobehavioral
- neurobiological
- neurobiologist
- neurobiology
- neuroblast
- neuroblastoma
- neurochemical
- neurochemist