nifteind
nafnorðkvenkynnift-eind
efnafræði
öreind í frumeindakjarna sem ekki hefur rafhleðslu (e. neutron)
Fallbeygingar
Eintala
Eintala m. greini
Nf.
nifteind
nifteindin
Þf.
nifteind
nifteindina
Þgf.
nifteind
nifteindinni
Ef.
nifteindar
nifteindarinnar
Fleirtala
Fleirtala m. greini
Nf.
nifteindir
nifteindirnar
Þf.
nifteindir
nifteindirnar
Þgf.
nifteindum
nifteindunum
Ef.
nifteinda
nifteindanna