N. cinerea is an abbreviated binomial name that may refer to the following species:
Bacteria Neisseria cinerea – a proteobacterium
Plants Namibia cinerea – a dicot
Insects Nauphoeta cinerea – speckled cockroach Nemacerota cinerea – a moth Nepa cinerea – a water scorpion
Mammals Neophoca cinerea – Australian sea lion Neotoma cinerea – bushy-tailed woodrat