serration serration /sɛˈreɪʃən/

noun

1. A single notch in a row of notches  ( serration )
   a single notch in a row of notches
    One of the serrations was broken off
   one of the serrations was broken off
   
   
2. A row of notches  ( serration )
   a row of notches
    The pliers had serrations to improve the grip
   the pliers had serrations to improve the grip
   
3. The condition of being serrated  ( serration )
   the condition of being serrated
    The serrations of a city skyline
   the serrations of a city skyline
   

 negro negro /ˈniːgroʊ/

adjective

1. () Having skin rich in melanin pigments  ( coloured , negro , colored )
   having skin rich in melanin pigments
   

 Negro

noun

1. () A person with African ancestry,  ( African-American , Black , Negroid , Negro )
   a person with African ancestry,
    Negro
   Negro
    Negroid
   Negroid
   
   

 Diego Rivera Diego Rivera /diˈɛgoʊ riˈvɛrə/

noun

1. Socialist Mexican painter of murals (1886-1957)  ( Diego Rivera , Rivera )
   socialist Mexican painter of murals (1886-1957)
   
   

 Argentina Argentina /ˌɑːrdʒənˈtiːnə/

noun

1. Type genus of the Argentinidae: argentines  ( Argentina , genus Argentina )
   type genus of the Argentinidae: argentines
   
2. A republic in southern South America; second largest country in South America  ( Argentina , Argentine Republic )
   a republic in southern South America; second largest country in South America
    The tango is a traditional dance in Argentina
   The tango is a traditional dance in Argentina