putamen /pū-tāˈmən/

1. A fruit-stone (botany)
2. The membrane within an eggshell (zoology)
3. The lateral part of the lenticular nucleus of the cerebrum (anatomy)

• orthotropy
• orthros
• orthroses
• ortolan
• ortolans
• orts
• orval
• orvals
• Orvietan
• Orvieto
• Orwellian
• or whatever
• or whenever
• or wherever
• oryctologies
• oryctology
• oryx
• oryxes
• Oryza
• orzo
• orzos
• os
• O's
• OS
• Os