"Stem ician" is not a recognized word in the English language. It seems like a possible misspelling or a combination of words that don't form a meaningful term.

It's possible you meant one of these:

* "Stemician": This could be a misspelling of "scientist," someone who studies science.

* "Stemician": This could be a misspelling of "technician," someone who is skilled in a particular technical field.

* "Stem" + "Ician": These are two separate words. "Stem" refers to the base or main part of something, while "Ician" is not a recognized word.

If you can provide more context or a sentence where you encountered this term, I might be able to provide a more accurate answer.