1.Definition: (microscopy) a dye or other coloring material that is used in microscopy to make structures visible

Category: General

2.Definition: a soiled or discolored appearance

"The wine left a dark stain"

Related Noun(s):discoloration, discolouration

Category: General

3.Definition: a symbol of disgrace or infamy

Related Noun(s):brand, mark, stigma

Category: General

4.Definition: an act that brings discredit to the person who does it

Related Noun(s):blot, smear, smirch, spot

Category: General

5.Definition: the state of being covered with unclean things

Related Noun(s):dirt, filth, grease, grime, grunge, soil

Category: General