axoneme
noun
ax·o·neme ˈak-sə-ˌnēm 
: the fibrillar bundle of a flagellum or cilium that usually consists of nine pairs of microtubules arranged in a ring around a single central pair
axonemal
ˌak-sə-ˈnē-məl
adjective 
Word History
Etymology
Greek axōn axis + nēma thread, from nēn to spin — more at needle
First Known Use
1901, in the meaning defined above
Medical Definition
axoneme
noun
ax·o·neme ˈak-sə-ˌnēm
: the fibrillar bundle of a flagellum or cilium that usually consists of nine pairs of microtubules in a ring around a single central pair