- causing or inducing sleep.
- a drug or other agent that induces or tends to induce sleep.
Origin of somnifacient
1885–90; < Latin somn(us) sleep + -i- -i- + -facient
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for somnifacient
The consciousness of having relieved the necessities of others is probably the best appetizer and somnifacient that we have.Religion And Health
James J. Walsh
- Tending to produce sleep; soporific.