n.

1. 匾；飾板
2. 銘牌；徽章
3. 【醫】血小板；齒菌斑

n.

1. an ornamental tablet fixed to a wall in commemoration of a person or event.
2. a sticky deposit on teeth in which bacteria proliferate.
3. Medicine  a small, distinct, typically raised patch on or within the body, caused by local damage or deposition of material.
   ▸Microbiology  a clear area in a cell culture caused by the inhibition of growth or destruction of cells.
4. a flat counter used in gambling.