ax·o·neme 
(ăksə-nēm′)
(ăksə-nēm′)n.
A bundle of microtubules and associated proteins that makes up the core of a cilium or flagellum, consisting of nine pairs of microtubules arranged around two single microtubules.
[Greek axōn, axis + Greek nēma, thread; see (s)nē- in the Appendix of Indo-European roots.]
ax′o·nemal adj.