impression

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impression

Dentistry an imprint of the teeth and gums, esp in wax or plaster, for use in preparing crowns, inlays, or dentures

impression

[im′presh·ən]
(geology)
A form left on a soft soil surface by plant parts; the soil hardens and usually the imprint is a concave feature.
(graphic arts)
A print made from an engraved plate.
A press run or printing of a book.
(metallurgy)
A machined cavity in a forging die for production of a specific geometric shape in the workpiece.

impression

An advertisement on a Web page. If ads on the Web are not based on a click-through rate (CTR), they are typically sold on a cost per thousand (CPM) basis. One impression is one banner ad displayed on one page. Also called a "view" or "ad view." See banner ad, interstitial ad, pay-per-click and click-through rate.
References in periodicals archive ?
Maxillary and mandibular impressions were made with heavy body and light body impression material and master cast were obtained.
The dual arch or double arch impression technique as described by Wilson and Werrin, is convenient in that it makes the required maxillary and mandibular impressions, as well as the interocclusal record in one procedure.
Complete arch maxillary and mandibular impressions were made with irreversible hydrocolloid (Algioplast; Heraeus Kulzer, South Bend, India) and used to obtain diagnostic casts, using type III dental stone(Lab stone, Kalabhai, Mumbai, India).