虫垂

Etymology
Appears to be a coinage in Japanese as a compound of, replacing earlier.

It seems that the portion in the older term was first replaced with  as, which in turn was shortened to modern.

Compare 🇨🇬, 🇨🇬.

Noun

 * 1)  an appendix, a vermiform appendix

Usage notes
In informal usage, the term is more common. In medical contexts, is preferred, as  refers more specifically to the caecum instead of the appendix.

Derived terms

 * : appendicitis