▁renamed ▁ant ib iot ics ▁by ▁Sel man ▁W aks man , ▁an ▁American ▁micro bi ologist , ▁in ▁ 1 9 4 2 . ▁ ▁The ▁term ▁ant ib i otic ▁was ▁first ▁used ▁in ▁ 1 9 4 2 ▁by ▁Sel man ▁W aks man ▁and ▁his ▁collabor ators ▁in ▁journal ▁articles ▁to ▁describe ▁any ▁subst ance ▁produced ▁by ▁a ▁micro organ ism ▁that ▁is ▁ant agon istic ▁to ▁the ▁growth ▁of ▁other ▁micro organ isms ▁in ▁high ▁dil ution . ▁This ▁definition ▁ex cluded ▁subst ances ▁that ▁kill ▁b acter ia ▁but ▁that ▁are ▁not ▁produced ▁by ▁micro organ isms ▁( such ▁as ▁g astr ic ▁ju ices ▁and ▁hydro gen ▁per ox ide ). ▁It ▁also ▁ex cluded ▁synth etic ▁ant ib acter ial ▁comp ounds ▁such ▁as ▁the ▁sul fon am ides . ▁In ▁current ▁usage , ▁the ▁term ▁" ant ib i otic " ▁is ▁applied ▁to ▁any ▁medic ation ▁that ▁k ills ▁b acter ia ▁or ▁in hib its ▁their ▁growth , ▁regardless ▁of ▁whether ▁that ▁medic ation ▁is ▁produced ▁by ▁a ▁micro organ ism ▁or ▁not . ▁ ▁The ▁term ▁" ant ib i otic " ▁der ives ▁from ▁anti ▁+ ▁ β ι ω τ ι κ ό ς ▁( bi ō t ik os ), ▁" fit ▁for ▁life , ▁l ively ", ▁which ▁comes ▁from ▁ β ί ω σ ι ς ▁( bi ō s is ), ▁" way ▁of ▁life ", ▁and ▁that ▁from ▁ β ί ος ▁( b