argillite argillite /ˈɑrdʒɪlaɪt/

noun

1. A sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages  ( argillite )
   a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
    The geologist took a sample of argillite to study its composition.
   The geologist took a sample of argillite to study its composition.
   
   

 cross-link cross-link /ˈkrɔːs lɪŋk/

noun

1. A side bond that links two adjacent chains of atoms in a complex molecule  ( cross-link , cross-linkage )
   a side bond that links two adjacent chains of atoms in a complex molecule
   
   

verb

1. Join by creating covalent bonds (of adjacent chains of a polymer or protein)  ( cross-link )
   join by creating covalent bonds (of adjacent chains of a polymer or protein)
   

 stone-face stone-face /ˈstoʊnˌfeɪs/

noun

1. Any plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stones  ( flowering stone , lithops , living stone , stone life face , stone plant , stone-face , stoneface )
   any plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stones
   
   

 Kaufman Kaufman /ˈkɔfmən/

noun

1. United States playwright who collaborated with many other writers including Moss Hart (1889-1961)  ( George S. Kaufman , George Simon Kaufman , Kaufman )
   United States playwright who collaborated with many other writers including Moss Hart (1889-1961)