1. (anatomy and zoology) an opening; a passage

Derived forms: ostia

Encyclopedia: Ostium

• pustulate
• pustule
• put
• put a sock in it
• put across
• put aside
• put away
• put back
• put behind bars
• put differently
• put forward
• put on airs
• put on the line
• put one across
• put one over
• put option
• put out feelers
• put over
• put right
• put the cart before the horse
• put the cat among the pigeons
• put through
• put to death
• put to sleep
• put to work