| accretion | 1. Increase by addition to the periphery of material of the same nature as that already present; e.g., the manner of growth of crystals. Synonym: accrementition. 2. In dentistry, foreign material (usually plaque or calculus) collecting on the surface of a tooth or in a cavity. 3. A growing together. Origin: L. Accretio, fr. Ad, to, + crescere, to grow (05 Mar 2000) |
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| accretion lines | Line's seen in microscopic sections of the enamel, marking successive layers of added material. (05 Mar 2000) |
| accretionary growth | Growth by an increase of intercellular material. (05 Mar 2000) |