人的手掌是微凹的。

The palm of one's hand is slightly concave.

《新英汉大辞典》

花瓣5枚，先端微凹，野生蔷薇为单瓣，也有重瓣栽培品种。

Flower petal 5, the tip micro concave, the wild wild rose is a single-lobe, also has the double petals cultivated variety.

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叶1片顶生于卵球形假鳞茎上，狭长圆形，长10-14厘米，宽1.8-2.3厘米，先端微凹，基部收窄成长约1.5厘米的柄。

Pseudobulbs ovate, 1-leaved at apex. Leaves narrowly oblong, 10-14 cm long and 1.8-2.3 cm wide, apex emarginate, base attenuate;

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