Barr body. Definition. noun. The small, dark-staining mass of inactive X chromosome within the nucleus of non-dividing cell. Supplement. Barr bodies are previously used as the basis for sex determination especially during the Olympics (see Barr test). Word origin: named after its discoverer Murray Llewellyn Barr, a Canadian anatomist who first identified the particle in the nucleus of neurons of female cats. Synonym: sex chromatin.
As of September 2011, there are nine Unified Combatant Commands as specified in Title 10 and the latest annual UCP. Six have regional responsibilities, and three have functional responsibilities.
Type Comm (TYCOM), Combat Com (COCOM), Operational Comm (OPCOM), Tactical Control (TACON), Support, Admin Control (ADCON), Coordinating Auth, Direct Liaison Auth (DIRLAUTH) TYCOM - Under Commander in Chief of Fleets, Type Commanders command all ships or units of a certain type. NECC is TYCOM for NCG. COCOM - Authority of a Combatant Commander to command over assigned forces involving organizing and employing commands and forces. Tasks, objectives and direction.