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Related to hygroscopic expansion: deliquescent
1. expansion due to the absorption of moisture;
2. in dental casting, the addition of water to the surface of the casting investment during setting to increase the size of the mold.
Farlex Partner Medical Dictionary © Farlex 2012
hy·gro·scop·ic ex·pan·sion(hīgrō-skopik eks-panshŭn)
1. Expansion due to absorption of moisture.
2. In dental casting, addition of water to surface of casting investment during setting to increase the size of the mold.
Medical Dictionary for the Dental Professions © Farlex 2012