Final answer:
The medical term 'axilla' has a plural form that ends in '-ae' to maintain precision and consistency in medical terminology.
Step-by-step explanation:
The term axilla is a medical term that ends in -a, and its plural form adheres to a traditional Latin-based pluralization by ending in -ae. While some words of Latin origin have adopted more regular English plurals that end with an -s, in the context of anatomy and in formal medical terminology, the use of -ae is more precise and is preferred to maintain consistency and reduce ambiguity. For instance, anatomical terms like 'axillae' preserve the original Latin pluralization. Anatomists and healthcare providers use such terminology for its precision and to avoid medical errors.