What does pinhole mean?
Pinhole means A small hole, of a size that could have been made by a pin.
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/ˈpɪnˌhoʊl/ · noun
A small hole, of a size that could have been made by a pin.
These [the eyes of the nautilus] are the simplest eyes of any large living animal -- lensless 'pinholes' that project a hazy and rather dim image onto its retinas.
Use pinhole when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pinhole means A small hole, of a size that could have been made by a pin.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
These [the eyes of the nautilus] are the simplest eyes of any large living animal -- lensless 'pinholes' that project a hazy and rather dim image onto its retinas.
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