Decaffeinated coffee comes from a chemical process that takes out caffeine from the beans. Pharmaceutical and soda companies buy the extracted caffeine.
CONCAVE
concave
(adjective) curving inward
Source: WordNet® 3.1
Etymology
Adjective
concave (comparative more concave, superlative most concave)
curved like the inner surface of a sphere or bowl
(geometry, not comparable, of a polygon) not convex; having at least one internal angle greater than 180 degrees.
(functional analysis, not comparable, of a real-valued function on the reals) satisfying the property that all segments connecting two points on the function's graph lie below the function.
hollow; empty
Antonyms
• convex
Noun
concave (plural concaves)
A concave surface or curve.
The vault of the sky.
One of the celestial spheres of the Ptolemaic or geocentric model of the world.
(manufacturing) An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
(surfing) An indentation running along the base of a surfboard, intended to increase lift.
(skateboarding) An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
Verb
concave (third-person singular simple present concaves, present participle concaving, simple past and past participle concaved)
To render concave, or increase the degree of concavity.
Source: Wiktionary
Con"cave ( or ; 277), a. Etym: [L. concavus; con- + cavus hollow: cf. F. concave. See Cave a hollow.]
1. Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky.
2. Hollow; void of contents. [R.] As concave . . . as a worm-eaten nut. Shak.
Con"cave, n. Etym: [L. concavum.]
1. A hollow; an arched vault; a cavity; a recess. Up to the fiery concave towering hight. Milton.
2. (Mech.)
Definition: A curved sheath or breasting for a revolving cylinder or roll.
Con"cave, v. t. [imp. & p. p. concaved (; p. pr.& vb. n. Concaving.]
Definition: To make hollow or concave.
Source: Webster’s Unabridged Dictionary 1913 Edition
Recent Word Finds
Word of the Day
23 February 2025
BARGAIN
(noun) an advantageous purchase; “she got a bargain at the auction”; “the stock was a real buy at that price”
Coffee Trivia
