concave shape
Definition
Noun: A shape or surface that curves or bends inward, like the interior of a bowl or a cave. It is the opposite of a convex shape, which curves outward.
Usage
The term "concave shape" is used to describe the geometric property of an object or surface. It is a formal or technical term common in mathematics, physics, engineering, and design.
Examples
- The concave shape of a satellite dish helps to focus signals to a single point.
- A spoon has a concave shape on one side.
- The architect designed a roof with a slight concave shape to channel rainwater.
Advanced Usage
- In Optics: Lenses that are thinner in the center than at the edges are described as having a concave shape, which causes light rays to diverge (spread apart).
- As a Descriptor: The term can be used descriptively, e.g., "The land formed a concave shape, creating a natural amphitheater."
Variants and Related Words
- Concavity (n): The state or quality of being concave. (e.g., "The concavity of the mirror was precisely calculated.")
- Concave (adj): Describing a surface that is curved inward. This is the adjective form from which "concave shape" is derived. (e.g., "a concave lens")
Synonyms
- Hollow
- Incurved
- Sunken
- Dished
Antonyms
- Convex shape
- Protuberance
- Bulge
Noun
-
a shape that curves or bends inward
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