chromonema
noun
chro·mo·ne·ma ˌkrō-mə-ˈnē-mə 
plural chromonemata ˌkrō-mə-ˈnē-mə-tə
: the coiled filamentous core of a chromatid
chromonematic
ˌkrō-mə-ni-ˈma-tik
adjective 
Word History
Etymology
borrowed from German Chromonem, from chromo- chromo- + -nem, borrowed from Greek nêma "thread" — more at nemato-
Note: The German word was introduced by the Czech zoologist František Vejdovský (1849-1939) in Zum Problem der Vererbungsträger (Prague, 1911-12), p. 130.
First Known Use
circa 1925, in the meaning defined above
Medical Definition
chromonema
noun
chro·mo·ne·ma ˌkrō-mə-ˈnē-mə
plural chromonemata -ˈnē-mət-ə
: the coiled filamentous core of a chromatid