der Abdruck
imprint
A mark or shape created by pressure on a surface.
Die Polizei sicherte die Fingerabdrücke am Tatort.
The police secured the fingerprints at the crime scene.

imprint / print
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imprint
A mark or shape created by pressure on a surface.
Die Polizei sicherte die Fingerabdrücke am Tatort.
The police secured the fingerprints at the crime scene.

'Abdruck' derives from the verb 'abdrucken' (to print/reproduce) and consists of 'ab-' and 'Druck' (pressure/print). It describes the result that occurs when something is transferred onto another surface through pressure (drücken) or through printing (drucken).
Der feuchte Sand zeigte den Abdruck seiner Schuhe.
The wet sand showed the imprint of his shoes.
The context makes the meaning clear. Words like 'Polizei' (police), 'Spur' (trace), or 'Finger' (finger) point to a mark or trace. Words like 'Zeitung' (newspaper), 'Buch' (book), or 'Foto' (photo) point to a printed copy. 'Zahnarzt' (dentist) or 'Gebiss' (set of teeth) indicate the dental context.
Der Künstler erlaubte den Abdruck seines Bildes im Ausstellungskatalog.
The artist allowed the reproduction of his picture in the exhibition catalog.
In the meaning of 'Spur' (trace/mark), 'Abdruck' is often part of compound nouns. The best known are 'der Fingerabdruck' (fingerprint) and 'der Fußabdruck' (footprint).
Für den neuen Reisepass musste ich meine Fingerabdrücke abgeben.
For the new passport, I had to provide my fingerprints.
In a medical context, especially at the dentist's, 'Abdruck' almost always means the mold of the teeth. Typical verbs in this context are 'einen Abdruck machen' (to make an impression) or 'einen Abdruck nehmen' (to take an impression).
Der Kieferorthopäde macht einen Abdruck für die Zahnspange.
The orthodontist takes an impression for the braces.
pressure / printing
'der Druck' and 'der Abdruck' look similar and both have to do with pressing or printing, but they do not mean the same thing. 'Druck' can mean the force acting on a surface, or the process of printing. 'Abdruck', on the other hand, is often the result: a mark, a mold, or a printed reproduction. So you can make an Abdruck through Druck. The words are especially easy to confuse because 'Druck' names the cause or the process, while 'Abdruck' usually names the visible result.

Auf dem nassen Boden blieb ein deutlicher Abdruck von ihrem Schuh.
A clear imprint of her shoe was left on the wet floor.
Der Druck im Fahrradreifen ist zu niedrig.
The pressure in the bicycle tire is too low.