Terpenes can oxidize terpenoids- are you saying actual terpenes are not found in cannabis? Because I think there is a lot of literature that goes against that.
Limonene for instance- it is a pure hydrocarbon, which makes it NOT literally a terpenoid ,and it definitely has a strong lemon smell.
I think you may be using the looser definition of the term, as in the quote below:
"Terpenes are hydrocarbons resulting from the combination of several isoprene units. Terpenoids can be thought of as modified terpenes, wherein methyl groups have been moved or removed, or oxygen atoms added. (Some authors use the term "terpene" more broadly, to include the terpenoids.) Just like terpenes, the terpenoids can be classified according to the number of isoprene units used..."
Either way, the term "terpene" is completely acceptable and chemically correct for the compounds we are talking about.