a very small hole in something, especially one made by a pin 针刺的孔;针孔
Examples from the Corpus
pinhole• My lungspull for the thickplastic air like getting it through a pinhole.• Now, if you make a cup very deep and turn the sides over, you eventually make a lensless pinholecamera.• This is pumped around the system and is effective at sealingpinholeleaks.• All I ever saw was the apples with little sharppinholes in them.• The outline is punched with small pinholes using a sewingtracingwheel.• It was a cold morning, and a thinjet of steam rose from the pinholevent on the coffee cup lid.• She uses only the pinhole camera or, as it was known in pre-photographic times, the cameraobscura.• The enchanted house builder was not the first person to notice this pinhole effect.