stomatic

The stomatic openings on the leaf close when the air is dry.

用法提示：stomatic 是形容词，修饰 openings，表示‘气孔的’。

Scientists measured the stomatic density on the upper and lower surfaces of the leaf.

用法提示：stomatic 作为形容词修饰 density，说明该密度与气孔相关。

A stomatic guard cell changes shape to open or close the pore.

用法提示：stomatic 修饰 guard cell，表示该细胞属于气孔，体现其形容词用法。