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

See also: achromatic, neutral

• rocket propellant
• rocket propellent
• rocket propulsion
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• Rockingham podocarp
• rocklike
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• rockrose family
• rockslide