Impression

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Related to impression tray: impression material

Impression

A user's view of an online advertisement. Each time a website viewer sees an online ad, this is one impression. The more impressions an ad receives, the more likely it is that a user will click on it. Most online ads are sold by cost per thousand of impressions. See also: CPC.
References in periodicals archive ?
Imagine you've just removed an impression tray from a patient's mouth, only to find that there is a void in a critical area, or that the teeth have contacted the tray, requiring the impression to be taken over.
AvaDent transfers patient stone models, impression trays, and other records into their digital computerss system to create the perfect, personalized AvaDent[R] digital denture every time.
Two impression trays were fabricated using cold cure acrylic resin (DPI-RR Cold Cure, Dental Products India; Mumbai, India) for the CIT (Figure 1(a)) and TLIT (Figure 1(b)).