What does CIEN stand for?

Cervical Intraepithelial Neoplasia - Medicine (MELL)

Ciena - Stock market symbol

CIENA Corp. - NASDAQ symbol (SPSG)

Commission Interamericaine d'Energie Nucleaire - Inter-American Nuclear Energy Commission

Companhia de Interconexao Energetica - Interconnection Energy Company (ESKOM)

Conjunctival Intraepithelial Neoplasia - Medicine (MELL)