Rubicon Rubicon /ˈruːbɪkɔn/

noun

1. A line that when crossed permits of no return and typically results in irrevocable commitment  ( point of no return , Rubicon )
   a line that when crossed permits of no return and typically results in irrevocable commitment
   
2. The boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war  ( Rubicon )
   the boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war
    Crossing the Rubicon was a significant event in history.
   Crossing the Rubicon was a significant event in history.
   
   

 uncial uncial /ˈʌnsiəl/

adjective

1. Relating to or written in majuscule letters (which resemble modern capitals)  ( uncial )
   relating to or written in majuscule letters (which resemble modern capitals)
    Uncial letters
   uncial letters
   

noun

1. A style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries  ( uncial )
   a style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries
    In the museum, there's a manuscript written in uncial script.
   In the museum, there's a manuscript written in uncial script.
   
   

 Mickey Charles Mantle Mickey Charles Mantle /ˈmɪki ˈtʃɑrlz ˈmæntəl/

noun

1. United States baseball player (1931-1997)  ( Mantle , Mickey Charles Mantle , Mickey Mantle )
   United States baseball player (1931-1997)
   
   

 critter critter /ˈkrɪtɝ/

noun

1. A regional term for 'creature' (especially for domestic animals)  ( critter )
   a regional term for 'creature' (especially for domestic animals)
    Every night, a little critter visits our backyard, nibbling on leftover food.
   Every night, a little critter visits our backyard, nibbling on leftover food.