The word "concave" is spelled with a "c-o-n-c-a-v-e" and is pronounced /kɒnˈkeɪv/. The "c" is pronounced as "k" and the "a" is a short vowel sound. The "v" is pronounced as "v" and the "e" at the end of the word is pronounced as "ɛ". "Concave" means curving inward, like the interior of a circle or sphere, and is often used to describe lenses or mirrors. Knowing how to spell and pronounce this word correctly can be helpful in discussing mathematical or scientific concepts.
Concave is an adjective used to describe a surface or shape that curves inward or is rounded inward. It is the opposite of convex, which describes a surface or shape that curves outward. The term is derived from Latin, with the prefix "con-" meaning "together" and the adjective "cavus" meaning "hollow" or "curved in."
In geometry, concave is often used to describe an object, such as a lens or mirror, that has a surface that curves inward. This inward curvature causes light rays to diverge or spread apart after passing through the object. Concave lenses are used to correct nearsightedness, as they help focus light rays so they converge on the retina.
In terms of anatomy, concave may refer to a hollow or curved inward structure of the body. For example, the concave curve of the spine is its natural inward curvature. Similarly, the concave shape of the human eye's cornea helps with focusing light directly onto the pupil.
In everyday language, concave can also describe a depression or inward curve in a non-geometric sense. For instance, a concave road sign may have a depressed or sunken surface, while a concave wall can be characterized by a curved or indented shape.
Overall, concave is a term used across various fields to describe curves, surfaces, or shapes that bend or curve inward.
Having a spherically hollowed surface.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
• Hollow.
• A hollow place scooped out; the inner surface of any rounded or spherical body-the inside is called the concave surface, the outside the convex surface.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word concave has its origin in the Latin word concavus, which means hollow or curved inward. It derives from the combination of the prefix con- meaning together or with, and cavus meaning hollow.