| Term | hydrocolloid |
| Pronunciation | hiy-druh-KAH-loyd |
| See also | reversible hydrocolloid, irreversible hydrocolloid, alginate, polyether, polyvinylsiloxane, polysulfide |
| Definition | A material that forms a gel when mixed with water, useful as a dental impression material. It has fallen out of favor because it is easily torn and has low dimensional stability, though alginate hydrocolloid is still used for less-critical impressions like diagnostic or opposing models. |
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