pia mater /pīˈə māˈtər/ (anatomy)

1. The vascular membrane surrounding the brain and spinal cord
2. The brain (Shakespeare)

• obsolescent
• obsolesces
• obsolescing
• obsolete
• obsoleted
• obsoletely
• obsoleteness
• obsoletenesses
• obsoletes
• obsoleting
• obsoletion
• obsoletions
• obsoletism
• obsoletisms
• obstacle
• obstacle race
• obstacle races
• obstacles
• obstetric
• obstetrical
• obstetrically
• obstetrician
• obstetricians
• obstetrics
• obstinacies