[ som-nuh-fey-shuhnt ]
/ ˌsɒm nəˈfeɪ ʃənt /


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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences 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

Medical definitions for somnifacient

[ sŏm′nə-fāshənt ]


Tending to produce sleep; soporific.

Other words from somnifacient

som′ni•facient n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.