Haustorium(pl. haustoria) A specialized outgrowth of many parasitic fungi and certain parasitic plants such as dodder (C吸器：是某些寄生真菌和某些寄生植物如菟丝子（菟丝子属）和肉苁蓉（列当属）所长出的特化结构，它可以刺入寄主植物体内并从寄主细胞中吸取营养物质。