ABC - DEF - GHI - JKL - MNO - PQRS - TUV - WXYZ Insomnia
Similar term(s): sleeplessness.
Definition:
Difficulty in going to sleep or getting enough sleep.
Source & ©:
NCI
NCI cancer.gov
dictionary 
To read about this term in context: GreenFacts Digest on Mercury:
ABC - DEF - GHI - JKL - MNO - PQRS - TUV - WXYZ | 
