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Study TIP. Reading Effectively: For many words ending in -um , the plural is formed by changing the -um to -a . For example, the plural of bacteri um is bacteri a ; the plural for flagell um is flagell a ; the plural for cili um is cili a .
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StudyTIP • Reading Effectively: For many words ending in -um, the plural is formed by changing the -umto -a. For example, the plural of bacterium is bacteria; the plural for flagellum is flagella; the plural for cilium is cilia.