Webster's English Dictionary

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chromatin

chro.ma.tin \'kro--m*-t*n\ \.kro--m*-'tin-ik\ n : the part of a cell 
   nucleus that stains intensely with basic dyes; spe cif : a complex of a 
   polymerized nucleic acid with basic proteins of protamine or histone type 
   present in chromomeres and held to be the physical carrier of genes - 
   chro.ma.tin.ic aj