Choose the plural form of the singular term alveolus.

Question

BlackTom AI · Accepted Answer

Words ending in the Latin suffix -us typically form their classical plural by replacing -us with -i. Alveolus is a Latin-derived anatomical term (diminutive of alveus, meaning a small hollow or cavity) that follows the second-declension Latin pattern: singular alveolus → plural alveoli.

Step-by-step reasoning:
1. Identify the ending: alveolus ends with "-us."
2. Recall the Latin plural rule for second-declension nouns: singular -us → plural -i.
3. Apply the rule: remove -us and add -i: alveolus → alveol + i = alveoli.
4. Verify with parallel examples: cactus → cacti, radius → radii, focus → foci. Alveolus follows the same pattern and is conventionally pluralized as alveoli in medical and biological contexts.

Why alveoli is correct:
- It follows the standard classical pluralization for Latin second-declension nouns and is the established plural used in anatomy and physiology to refer to multiple small cavities (e.g., the air sacs in the lungs are called alveoli).

Why other plausible forms are incorrect or less preferred:
- "Alveoluses" is an anglicized regular plural (adding -es) and, while sometimes encountered in casual usage, is not the standard scientific or classical plural.
- "Alveolae" would be the plural of a hypothetical Latin singular "alveola" (ending in -a, which would pluralize to -ae); however, the actual singular is alveolus, not alveola, so alveolae is not correct for this word.
- Any other forms contradict Latin declension rules or established medical usage.

Conclusion: Applying Latin second-declension pluralization yields alveoli, which matches the provided correct answer.

Choose the plural form of the singular term alveolus.Single choice

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