Princeton's WordNet(4.00 / 1 vote)Rate this definition: 1  kin, kinsperson, family(noun) a person having kinship with another or others. he's kin; he's family. 2  kin, kin group, kinship group, kindred, clan, tribe(adj) group of people related by blood or marriage.
How much does tray teeth whitening cost? Topics | Oral Health | Teeth Whitening | How much does tray teeth whitening cost? You can expect to pay anywhere from $10 to $40 for a tray-based teeth whitening kit purchased over the counter (OTC) from a pharmacy or other retail store. You can also purchase tray-based teeth whitening systems from dentists. These systems feature custom-fit tooth trays or mouthpieces, which is why they are significantly more expensive than OTC tray-based teeth whitening kits. Purchasing a tray-based teeth whitening system from your dentist may cost up to $500.
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