swab
US /swɑːb/
UK /swɑːb/

1.
棉签, 拭子
a small piece of absorbent material used for cleaning wounds, applying medication, or collecting specimens
:
•
The nurse used a cotton swab to clean the cut.
护士用棉签清洁伤口。
•
They took a throat swab to test for the infection.
他们取了喉咙拭子进行感染检测。