The meaning of Poison in the Bible
(From Easton's Bible Dictionary)

Heb. hemah, "heat," the poison of certain venomous reptiles (Deuteronomy 32:24,33; Job 6:4; Psalms 58:4), causing inflammation.

Heb. rosh, "a head," a poisonous plant (Deuteronomy 29:18), growing luxuriantly (Hosea 10:4), of a bitter taste (Psalms 69:21; Lamentations 3:5), and coupled with wormwood; probably the poppy. This word is rendered "gall", q.v., (Deuteronomy 29:18; 32:33; Psalms 69:21; Jeremiah 8:14, etc.), "hemlock" (Hosea 10:4; Amos 6:12), and "poison" (Job 20:16), "the poison of asps," showing that the rosh was not exclusively a vegetable poison.

In Romans 3:13 (Compare Job 20:16; Psalms 140:3), James 3:8, as the rendering of the Greek ios.

See more on the meaning of Poison in the Bible:
Poison {International Standard Bible Encyclopedia}

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