What is the definition or description of: dental plaque?

Dental Plaque: A biofilm of bacteria that forms on surfaces within the mouth.

Biofilm: There is bacteria in your mouth all the time. After eating and drinking throughout the day, the bacteria take what they want from that and start to merge into colonies to better protect themselves. They settle along our gum lines on our teeth. If you do not brush for a day or longer, your teeth will get a fuzzy or furry coating. That is called dental plaque.