- Increase by addition to the periphery of material of the same nature as that already present; the manner of growth of crystals.
- In dentistry, foreign material (usually plaque or calculus) collecting on the surface of a tooth or in a cavity.
- A growing together.
[L. accretio, fr. ad, to, + crescere, to grow]
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Examples: glitazone, GI cocktail, etc.