1. Of the colour of slate or granite
   "the slaty sky of dawn"
   - slate-grey [Brit, Cdn], slate-gray [US], slaty-grey [Brit, Cdn], slaty-gray [US], slatey, stone-grey [Brit, Cdn], stone-gray [US]

See also: achromatic, neutral

• genus Neurospora
• genus Neurotrichus
• genus Nicandra
• genus Nicotiana
• genus Nidularia
• genus Nierembergia
• genus Nigella
• genus Nigroporus
• genus Nimravus
• genus Nipa
• genus Nitella
• genus Nitrobacter
• genus Nitrosomonas
• genus Noctiluca
• genus Noctua
• genus Nolina
• genus Nomia
• genus Nopalea
• genus Nostoc
• genus Notechis
• genus Notemigonus
• genus Nothofagus
• genus Nothosaurus
• genus Notomys
• genus Notonecta