1. Acting with or showing thought and good sense
   - thoughtful

See also: serious, serious-mindedness

• olibanum
• oligarch
• oligarchic
• oligarchical
• oligarchy
• oligo-
• Oligocene
• Oligocene epoch
• Oligochaeta
• oligochaete
• oligochaete worm
• oligoclase
• oligodactyly
• oligodendria
• oligodendrocyte
• oligodendroglia
• oligodontia
• oligomenorrhea
• oligonucleotide
• Oligoplites
• oligopoly
• Oligoporus
• Oligoporus leucospongia
• oligopsony
• oligosaccharide