1. A thick black tar intermediate between petroleum and asphalt
   - maltha

Derived forms: mineral tars

Type of: mineral

• unrestrictive
• unretentive
• unretrievable
• unrevealed
• unrevealing
• unreverberant
• unrevised
• unrevived
• unrewarded
• unrewarding
• unrhetorical
• unrhymed
• unrhythmic
• unrhythmical
• unrifled
• unrig
• unrigged
• unrighteous
• unrighteously
• unrighteousness
• unrimed
• unrip
• unripe
• unripened
• unrivaled