from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several disorders that frequently interfere with sleep, occurring especially among children and including sleepwalking, night terrors, and bed-wetting.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several sleep disorders
Probably para-1 + (in)somnia.(American Heritage® Dictionary of the English Language, Fourth Edition)