中文翻译与英英解释

adj.
【植物；植物学】直生的〔指胚珠及其种脐、珠孔在一直线上〕。

(of a plant ovule) completely straight with the micropyle at the apex

例句与用法

When ovule orientation is orthotropous the chalaza corresponds to the point where the funicle is attached but in anatropous and campylotropous ovules the chalaza is some distance from the funicle
当胚珠的方向是直生胚珠时，合点和珠柄连成一条直线，当胚珠是倒生胚珠或弯生胚珠时，合点和珠柄之间有一定的距离。