来自辅音丛fl, 扑腾，拍打，拟声词。用来形容肌肉扑腾晃动的，松驰的。

1. The penis is usually in a flaccid state.

阴茎常处于萎软状态.

2. I picked up her wrist. It was limp and flaccid.

我抓起她绵软无力的手腕。

3. Flaccid constipation is characterized by a lazy or atonic intestinal muscle.

无张力性便秘的特点是肠内肌肉松弛无力.

4. Even while the muscles appear flaccid, some nerve threads may be functional.

甚至当肌肉出现无力, 一些神经纤维可能还是有功能的.

5. OBJECTIVE In order to supply the basis about the acute flaccid paralysis ( AFP ) cases surveillance.

目的为进一步做好急性迟缓性麻痹 ( AFP ) 病例监测,保持无脊髓灰质炎(脊灰)状态.