Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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dental floss a tough thread, often waxed, esp. made for removing food particles and plaque from between the teeth.
dental hygiene the care and cleaning of teeth, esp. by professional dental hygienists. [2 definitions]
dental hygienist a licensed specialist in preventive dental care, whose practice includes cleaning and x-rays, and who often works in a dentist's office.