light-tight
Definition
- Adjective:
- Not penetrable by light: Describes something that completely blocks the passage of light, preventing it from entering or escaping. This is a technical term often used in contexts where light exposure must be strictly controlled.
Usage
- The term "light-tight" is used to describe containers, rooms, seals, or materials designed to prevent any light from passing through. It is crucial in photography (for film handling), scientific experiments, and storage of light-sensitive materials.
Examples
- Adjective:
- The photographic darkroom must be completely light-tight to prevent film from being exposed.
- These light-tight bags are essential for storing undeveloped film.
- The experiment required a light-tight chamber to ensure accurate results.
Advanced Usage
- Technical Specification: Often used in technical manuals and specifications for equipment.
- Ensure the lid forms a light-tight seal before proceeding with the development process.
Variants and Related Words
- Lightproof (adj): A direct synonym meaning impervious to light. Often used interchangeably with "light-tight."
- A lightproof enclosure.
Synonyms
- Opaque: Not able to be seen through; not transparent. (Note: "Opaque" is a more general term, while "light-tight" specifically implies a designed or complete barrier.)
- Lightproof: Impervious to light.
Notes on Meaning
- The term is a compound adjective formed from "light" and "tight" (in the sense of "impervious" or "secure"). It describes a specific, functional property rather than a general characteristic.
Adjective
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not penetrable by light
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lightproof containers
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