There is terminological chaos in the education culture. Yes, this is about the words we use as authors. More specifically, it is about the language of instruction, not about cellulose and silicone.
As Aristotle put it,
“For as long as it is not clear in how many senses a term is used, it is possible that the answerer and the questioner are not directing their minds upon the same thing,… [and, therefore] It often happens that a difficulty is found in discussing or arguing a given position because the definition has not been correctly rendered.”
The stuff our books are made of is extremely important because classroom teachers rely instructionally on textbooks for engaging subject matter.