Related Clues:

• Twice the radius: Abbr.
• Cool, retro-style
• Impressive, to surfers
• Supercool
• Bitchin'
• 'So cool!'
• Eng. cooler
• Line through the ctr.
• "Excellent!"
• X-ray dose unit
• 'Far out, man'
• 'Killer, dude!'
• ''Neat-o!''
• Totally dope
• ''Terrific,'' in '80s slang