neologism
[nee-ol-uh-jiz-uh m]

noun
1. a new word, meaning, usage, or phrase.
2. the introduction or use of new words or new senses of existing words.
3. a new doctrine, especially a new interpretation of sacred writings.
4. Psychiatry. a new word, often consisting of a combination of other words, that is understood only by the speaker: occurring most often in the speech of schizophrenics.