Related Clues:

• Pos. opp
• Abbreviation on a car battery
• Like some nos
• -: Abbr
• Black batt. terminal
• Blood-bank abbr
• Blood type abbr
• Minus: Abbr
• Ion descriptor: Abbr
• Less than zero: Abbr
• Bit of blood-typing shorthand
• Bit of shutterbug slang
• Below zero (Abbr.)
• Not pos. or neut
• Like rarer blood types: Abbr