cen·tum 
(kĕntəm)
(kĕntəm)adj.
Designating those Indo-European languages, including the Italic, Hellenic, Celtic, and Germanic branches, that merged the palatal velar stops with the plain velars k, g, gh and maintained a distinction between them and the labiovelars kw, gw, gwh.
[Latin, hundred (a word whose initial sound in classical Latin illustrates the preservation of the Indo-European palatal velar as a velar k); see dek in the Appendix of Indo-European roots.]