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

See also: achromatic, neutral

• quartz lamp
• quartz mill
• quartz oscillator
• quartzite
• quartzose
• quasar
• quash
• quasi
• quasi contract
• quasi-NGO
• quasi-religious
• quasi-royal
• quasi-stellar radio source
• quasiparticle
• quassia
• Quassia amara
• quassia family
• quat
• quatercentenary
• quatercentennial
• quatern
• quaternary
• quaternary ammonium compound
• Quaternary period
• quaternate