from The Century Dictionary.
- noun Sleeplessness; insomnia.
from the GNU version of the Collaborative International Dictionary of English.
- noun Sleeplessness.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
Sorry, no etymologies found.
As for myself, had I the wings of an eagle, most likely I should still fly to you, and to several other quarters; but with railways and tub-gigs, and my talent for insomnolence, and fretting myself to fiddlestrings with all terrestrial locomotion whatsoever -- alas, alas!
Also, the side effect profile is very benign, with a very small incidence of insomnolence in the clinical trials but not much else.