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, volatile liquid, HCN, having a characteristic peach-blossom odor. It is one of the most deadly poisons. It is made by the action of sulphuric acid on yellow prussiate of potassium (potassium ferrocyanide), and chemically resembles hydrochloric and hydrobromic acids. Called also prussic acid, hydrogen cyanide, etc.…

ded as its active principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white crystalline substance, with a sharp, offensive taste. Hyoscyamine is isomeric with atropine, is very poisonous, and is used as a medicine for neuralgia, like belladonna. Called also hy…

Full of danger; threatening; menacing; perilous. Hairbreadth scapes i' the imminent deadly breach. Shak.

es; to kill the sale of a book. "To kill thine honor." Shak. Her lively color kill'd with deadly cares. Shak.

Deadly; mortal; fatal. "The lethal blow." W. Richardson. -- Le"thal*ly, adv.

Deadly; bringing death or destruction.

r of the sea. After draining of the level in Northamptonshire. Sir M. Hale. Shot from the deadly level of a gun. Shak.

Bather. [Obs.] Chaucer. For lever had I die than see his deadly face. Spenser.

Fitted to cause loathing; exciting disgust; disgusting. The most loathsome and deadly forms of infection. Macaulay. -- Loath"some*ly. adv. -- Loath"some*ness, n.

Virulence; deadly quality. His physicians discerned an invincible malignity in his disease. Hayward.

ll; as, mephitic odors. Mephitic air (Chem.), carbon dioxide; -- so called because of its deadly suffocating power. See Carbonic acid, under Carbonic.

A kind of cherry. See Morello. Great morel, the deadly nightshade. -- Petty morel, the black nightshade. See Nightshade.

to life; causing or occasioning death; terminating life; exposing to or deserving death; deadly; as, a mortal wound; a mortal sin.

Bringing or producing death; deadly; destructive; as, a mortiferous herb. Gov. of Tongue.

a low, branching weed with small white flowers and black berries reputed to be poisonous. Deadly nightshade. Same as Belladonna (a). -- Enchanter's nightshade. See under Enchanter. -- Stinking nightshade. See Henbane. -- Three-leaved nightshade. See Trillium.

which abounds on the Malabar and Coromandel coasts of the East Indies. From this seed the deadly poisons known as strychnine and brucine are obtained. The seeds are sometimes called Quaker buttons.

snakes, which feed on other snakes. Ophiophagus elaps is said to be the largest and most deadly of poisonous snakes.

, when introduced into the animal organism, is capable of producing a morbid, noxious, or deadly effect upon it; as, morphine is a deadly poison; the poison of pestilential diseases.

tions were planted culverins and sakers. Macaulay. The culverins and sakers showing their deadly muzzles over the rampart. Hawthorne.

. [Obs.] I spake of most disastrous chances, . . . Of hairbreadth scapes in the imminent, deadly breach. Shak.