which is more correct or more frequently used? Nonionic or non-ionic (polymers)? It´s for an academic presentation.
closed as off-topic by Roger Sinasohn, Dan Bron, David, J. Taylor, JonMark Perry Jul 25 '18 at 6:39
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Please include the research you’ve done, or consider if your question suits our English Language Learners site better. Questions that can be answered using commonly-available references are off-topic." – Roger Sinasohn, Dan Bron, David, J. Taylor
It would appear that nonionic is more common than non-ionic according to Google's ngrams:
Merriam-Webster spells it in the closed-form nonionic.
So, if you go by the dictionaries (or by a style guide that says to use a regional dictionary), use nonionic for a US audience and non-ionic for a UK audience.
Having said that, although the British corpus on Google Books Ngram Viewer shows that non-ionic is slightly more common in print in general, between 1989 and 1998 (for some reason), nonionic was actually used more often.