pin-hole
Definition
- Noun:
- A small hole made by or resembling a hole made by a pin: "pinhole" refers to a very tiny aperture, typically created by a sharp point such as a pin or needle.
Usage Examples
- Noun:
- The camera uses a pinhole to focus light onto the film. (A tiny hole used in optics.)
- She noticed a pinhole in the fabric where the needle had passed through. (A small hole in a material.)
- The pinhole in the paper allowed only a speck of light to enter. (A minuscule opening.)
Advanced Usage
"pinhole camera": a simple camera without a lens, using a small aperture to project an inverted image.
- We built a pinhole camera from a shoebox to photograph the eclipse. (A lensless camera device.)
"pinhole leak": a very small, often hard-to-detect leak in a pipe or container.
- The plumber found a pinhole leak in the copper pipe. (A tiny hole causing water loss.)
Variants and Related Words
Pinhole (adj): describing something that has or uses a very small opening.
- The pinhole viewer helped us observe the sun safely. (Descriptive of a device with a tiny hole.)
Pinprick (n): a small puncture or sensation like that made by a pin; often used metaphorically.
- He felt a pinprick of pain when the needle entered his skin. (A tiny sharp sensation.)
Synonyms
- Aperture: an opening, often small, through which light or air passes.
- Orifice: a small opening or hole in a body or object.
- Perforation: a small hole or series of holes made by piercing.
Related Idioms
- Not a pinhole of difference: used to emphasize that there is absolutely no difference between two things.
- The two designs are identical; there is not a pinhole of difference. (No difference at all.)
Notes on Usage
- The word "pinhole" is often written as one word (pinhole) or hyphenated (pin-hole). Both forms are acceptable, though "pinhole" is more common in modern technical writing.
- In everyday language, "pinhole" is used literally for tiny holes in materials or figuratively for anything extremely small or precise.