A jargon is characteristic language used by a specific group or profession. It originates from Old French meaning "chatter of birds". Jargons are commonly used in trades, professions, sports and casual groups to give a sense of belonging, though they can also make outsiders feel excluded. Examples of jargons include binomial nomenclature used in biology to formally name species, and chemical nomenclature used by chemists to systematically name compounds without ambiguity. While corporate jargons like "24*7" and "CxO" are sometimes criticized for obscuring meaning, they can also create shared understanding among colleagues when used effectively.