The plural form of bronchium, or an anatomical term sometimes used for the bronchial tubes of the respiratory system.
From Greek 'bronchos' (windpipe or throat). This is a technical anatomical plural that has largely been replaced by the more common 'bronchi' in modern medical terminology.
Medical terminology can be confusing because Latin and Greek plurals compete with each other—'bronchia' is the Greek way, while 'bronchi' is the Latinized version that doctors prefer today!
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