Source : Webster's Revised Unabridged Dictionary (1913)

Cytococcus \Cy`to*coc"cus\ (-k?k"k?s), n.; pl. {Cytococci}
   (-s?). [NL., fr. Gr. ??? hollow vessel + ???? kernel.]
   (Biol.)
   The nucleus of the cytula or parent cell. --H[ae]ckel.