1. (医用)拭子，棉签，药签
A swab is a small piece of cotton wool used by a doctor or nurse for cleaning a wound or putting a substance on it.

2. (用拖把、抹布等)擦洗，擦拭
If you swab something, you clean it using a wet cloth or a tool called a mop.

1. cleaning implement consisting of absorbent material fastened to a handle
for cleaning floors

Synonym: swobmop

2. implement consisting of a small piece of cotton that is used to apply medication or cleanse a wound or obtain a specimen of a secretion