详细解释:n. 脊椎, 脊柱, 花序轴
【医】 脊柱, 脊椎, 花序轴, 叶轴
词型变化：
名词复数:rachises形容词:rachial英语解释：
名词 rachis:
axis of a compound leaf or compound inflorescencethe series of vertebrae forming the axis of the skeleton and protecting the spinal cord同义词：spinal column, vertebral column, spine, backbone, back