<P> Ante Meridian is a misspelling for: </P> <Ul> <Li> Antimeridian a meridian at 180 ° from another or the meridian opposite the Prime Meridian </Li> <Li> Ante meridiem normally abbreviated a.m. for morning </Li> </Ul> <Li> Antimeridian a meridian at 180 ° from another or the meridian opposite the Prime Meridian </Li> <Li> Ante meridiem normally abbreviated a.m. for morning </Li>

What is the meaning of anti meridian and post meridian