ἰός (iós|ee-os'|noun|poison; corrosion)
[Grk] ἰός LN: 2.60, 8.74 GK: G2675 Hebrew: בֵּן‎, חֵילָה‎, חֵמָה‎, פָּרָשׁ‎
Derivation: perhaps from εἶμι (to go) or ἵημι (to send);
Strong's: rust (as if emitted by metals); also venom (as emitted by serpents)
KJV: --poison, rust.