1. Not methodically or according to plan
   "he dealt with his course work casually" 
2. In an unconcerned manner
   "glanced casually at the headlines"
   - nonchalantly

See also: casual

• positive chemotaxis
• positive correlation
• positive degree
• positive feedback
• positive fraud
• positive identification
• positive magnetic pole
• positive muon
• positive pole
• positive reinforcer
• positive reinforcing stimulus
• positive stimulus
• positively
• positively charged
• positiveness
• positivism
• positivist
• positivistic
• positivity
• positron
• positron emission tomography
• positron emission tomography scanner
• posology
• poss
• posse