somnolence som·no·lence (sŏm'nə-ləns)
n.
A state of drowsiness; sleepiness.
A condition of semiconsciousness approaching coma.
somnolent som·no·lent (sŏm'nə-lənt)
adj.
Drowsy; sleepy.
Inducing or tending to induce sleep; soporific.
In a condition of incomplete sleep; semicomatose.