Noun
English Wikipedia has an article on:axonemeWikipedia
axoneme (plural axonemes)
(biology) A bundle of nine microtubules forming the internal scaffolding of a cilium, with two extra central microtubules connecting the others if the cilium is motile
The axoneme of primary cilia typically has a ring of nine outer microtubule doublets (called a 9+0 axoneme), and the axoneme of a motile cilium has two central microtubule singlets in addition to the nine outer doublets (called a 9+2 axoneme). Source: Internet
Primary cilia are immotile, and are not undulipodia; they have a structurally different 9+0 axoneme rather than the 9+2 axoneme found in both flagella and motile cilia undulipodia. Source: Internet