an antibiotic (trade name Nebcin) that is especially effective against Gram-negative bacteria 特にグラム陰性バクテリアに対して効果的である抗生物質（商標名ネブシン）。
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【上位】 a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections; "when antibiotics were first discovered they were called wonder drugs" 微生物を殺し細菌感染を治すことができる、カビや細菌から抽出できる化学物質。
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