形容詞 axenic:

1. (of experimental animals) raised under sterile conditions
2. used of cultures of microorganisms; not contaminated by or completely free of the presence of other organisms

a.xen.ic

adj.（形容詞）
Not contaminated by or associated with any other living organisms. Usually used in reference to pure cultures of microorganisms that are completely free of the presence of other organisms.
無外來污染的，無生物污染的：沒有被污染或和其它活的生物體發(fā)生聯(lián)系的。經(jīng)常用來指微生物的純粹培養(yǎng)，這些微生物完全自由地游離于其它生物體的存在之外

【引伸】
axen.ically
adv.（副詞）