膄:
1. Anciently the same as "瘦" (shòu, meaning "thin" or "lean").
Example: "It is thin, in contrast to 'fat' and 'plump'." — (Shuōwén Jiězì) "Destroy and become thin and emaciated." — (Xiàojīng) "If left for a long time, it becomes lean and rotten." — (Zhōulǐ · Chánrén annotation) "There is a scholar avoiding the rain under the eaves, his clothes wet and sleeves thin, his shadow is thus even thinner." — (Qīng Dynasty · Zhōu Róng, "Yù Lǎorén Zhuàn")
2. Fine; not robust.
Example: "The fallen pines are full of golden hairpins, the distant trees stick to the sky like solitary mushroom children." — (Yáng Wànlǐ, "Liú Cūn Dù")