CONCAVOCONVEX

Con*ca`vo-con"vex, a.

1. Concave on one side and convex on the other, as an eggshell or a crescent.

2. (Optics)

Definition: Specifically, having such a combination of concave and convex sides as makes the focal axis the shortest line between them. See Illust. under Lens.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

27 June 2025

SQUARE

(adjective) having four equal sides and four right angles or forming a right angle; “a square peg in a round hole”; “a square corner”


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Coffee Trivia

According to Guinness World Records, the largest collection of coffee pots belongs to Robert Dahl (Germany) and consists of 27,390 coffee pots as of 2 November 2012, in Rövershagen, Germany.

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