from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Inducing or tending to induce sleep; soporific.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. soporific, sleep-inducing

from the GNU version of the Collaborative International Dictionary of English

  • adj. Causing sleep; somniferous; soporific.

from The Century Dictionary and Cyclopedia

  • Causing or tending to cause sleep; soporific.
  • Sleepy; somnolent.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. inducing mental lethargy
  • adj. sleep inducing


Sorry, no etymologies found.


  • The invalid held up, as if in thankfulness, his wasted hands to Heaven, and resisting no longer the soporiferous operation of the elixir, sunk down in a gentle sleep.

    The Talisman

  • Into this cavern the sun never enters, and a perpetual stillness reigns, no noise being heard but the soft murmur caused by a stream of the river Lethe, which creeps over the pebbles, and invites to slumber; at its entrance grow poppies, and other soporiferous herbs.

    Roman Antiquities, and Ancient Mythology For Classical Schools (2nd ed)

  • All this I was told; for, while the whole operation was performing, I lay in a profound sleep, by the force of that soporiferous medicine infused into my liquor.

    Journeys Through Bookland, Vol. 5

  • Amongst them all the father of the child remooved with his owne hands the stone of the Sepulchre, and found his Sonne rising up after his dead and soporiferous sleepe, whom when he beheld, he imbraced him in his armes, and presented him before the people, with great joy and consolation, and as he was wrapped and bound in his grave, so he brought him before the

    The Golden Asse

  • Its seed is prepared medicinally, being astringent and somewhat sedative; "So soporiferous," says Gerard, "that care must be had in the administration thereof, lest in provoking sleep you induce a drowsiness, or dead sleep."

    Herbal Simples Approved for Modern Uses of Cure

  • Petronius, in the time of Nero, A.D. 80, "delivered an odd receipt for dressing dormouse sausages, and serving them up with Poppies and honey, which must have been a very soporiferous dainty, and as good as owl pye to such as want a nap after dinner."

    Herbal Simples Approved for Modern Uses of Cure

  • "Whence I conclude," said Fritz, addressing himself, "that my orations must be somewhat soporiferous."

    Willis the Pilot

  • All this I was told, for while the whole operation was performing, I lay in a profound sleep, by the force of that soporiferous medicine infused into my liquor.

    Story Hour Readings: Seventh Year

  • Pronounce, define, and use in sentences: prosperous league inhabitant pulley perceived violent forty soporiferous syllable morsel dexterity metropolis intrepidity diminutive parallel hospitality

    Story Hour Readings: Seventh Year

  • The atmosphere is soporiferous, hardly conducive to editorial inspiration, and I find the commingled flavours of red-cedar, glue and rubber quite nourishing.

    The Fortune Hunter


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