From Biology-Online Dictionary | Biology-Online Dictionary


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