somniloquism
/sɑmˈnɪləˌkwɪzəm/
noun
- The act or habit of talking in one's sleep.
- Somniloquism is usually harmless and doesn't require treatment unless it disrupts others.
- Her somniloquism often woke up her roommate, who would hear her mumbling about math problems.
- He recorded his somniloquism one night and was amused to hear himself speaking in gibberish.