Synonym: deadly, destructive, harmful, malignant, noxious, toxic, venomous. Similar words: poison, monotonously, monotonous, sonorous, gluttonous, cacophonous, poise, porpoise. Meaning: ['pɔɪznəs] 
adj. 1. having the qualities or effects of a poison 2. not safe to eat 3. marked by deep ill will; deliberately harmful.
adj. 1. having the qualities or effects of a poison 2. not safe to eat 3. marked by deep ill will; deliberately harmful. 
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151, An extremely poisonous white compound, KCN, used in the extraction of gold and silver from ores, electroplating, and photography, and as a fumigant and insecticide.
152, Pufferfish stand to be the second most poisonous vertebrate in the world.
153, Chlorpyrifos was one kind of organophosphorus pesticides with higher efficacy and could substitute highly poisonous metham-sodium and parathion .
154, If poisonous defect pericardium, becloud deities is sent weigh disease to fizzle out urgently.
155, The filtration should be carried out in a hood because of the escape of poisonous gases.
156, The Portuguese man-of-war is a large poisonous jellyfish-like creature found in the UK.
157, The safekeeping party shall have appropriate safekeeping facilities for the storage of inflammable , explosive, poisonous, corrosive, radioactive and other dangerous articles.
158, Another drawback is that nitrobenzene is both poisonous and explosive.
159, Major occupational hazard factors at the plant studied included dust, noise, poisonous chemicals, and extremely low frequency electric field.
160, He has battled against Nazi villains, a Beduin swordsman and a pit of poisonous snakes. Sentencedict.com
161, People said that people who died of eating this grass would become ghosts. They could reincarnate only by finding a person who had also died by eating the poisonous grass.
162, If plastic and rubber are burnt, they'll give off poisonous gases.
163, Objective To explore resistance to carbon monoxide poisonous hypoxia by Ligustrazin.
164, Scientists have found many planets like HD 209458 b – huge gas giants that orbit hazardously close to their stars and have hellishly hot, poisonous atmospheres.
165, The bitter almond contains amygdalin. Acid or enzyme can decompose amygdalin to prussic acid and benzaldehyde. Prussic acid is a poisonous substance.
166, The witchweed steals water and nutrients from the roots and attacks the sorghum with a poisonous substance.
167, Can be uric convention checked piece diabetic with uric poisonous card?
168, It is very unusual for a mammal to lay eggs or to have poisonous spurs!
More similar words: poison, monotonously, monotonous, sonorous, gluttonous, cacophonous, poise, porpoise, noisome, prison, orison, honour, prisoner, benison, liaison, iron out, jettison, garrison, imprison, pronoun, comparison, imprisoned, caparison, dishonour, pronounce, by comparison, pronounced, james madison, imprisonment, mispronounce.