Medical Terminology / Unit 1 MedTerm 0039 short lesson, about 20 seconds
Plural Rule: um Becomes a
Captions available
The idea
A singular ending in u m forms its plural by changing the u m to a.
In practice
Ovum becomes ova; bacterium becomes bacteria; serum becomes sera.
Where people slip
Bacteria is already plural. One organism is a bacterium, a distinction charts still get wrong.
Your place on the trail
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