Related Clues:

• Big knob, often: Abbr.
• Math calc.
• Big ref.
• Tennessee jock
• TV control (Abbr.)
• Encyc. unit
• Lexicographer's bk.
• Vol. on a stand, maybe
• Abbr. on a book's spine
• 3-D stat
• iPod control: Abbr.
• Switch on a radio: Abbr.
• Cassette knob abbr.
• Solid geometry abbr.
• Knob on a stereo (Abbr.)