aux.o.troph
n.（名词）An organism, such as a strain of bacteria, that has lost the ability to synthesize certain substances required for its growth and metabolism as the result of mutational changes.营养缺陷型：一种有机体，如细菌菌株，因某种突变的结果而失去合成某种生长及代谢所需物质的能力
来源：Back-formation from auxotrophic 源自 auxotrophic的逆构词
