conchoid (plural conchoids)
(mathematics, geometry) Any of a family of curves defined as the locus of points p, such that each p is on a line that passes through a given fixed point P and intersects a given curve, C, and the distance from p to the point of intersection with C is a specified constant (note that for nontrivial cases two such points p satisfy the criteria, and the resultant curve has two parts).
(geology) A conchoidal fracture in rock.
The fixed point (P) of the construction may be referred to as the focus of the conchoid; it may also be defined as the origin (of a Cartesian coordinate system) or the pole (if polar coordinates are used), and potentially referred to accordingly. The curve C is an example of a directrix.
Source: Wiktionary
Con"choid, n. Etym: [Gr. conchoĂŻde.] (Geom.)
Definition: A curve, of the fourth degree, first made use of by the Greek geometer, Nicomedes, who invented it for the purpose of trisecting an angle and duplicating the cube.
Source: Webster’s Unabridged Dictionary 1913 Edition
17 January 2025
(verb) conform one’s action or practice to; “keep appointments”; “she never keeps her promises”; “We kept to the original conditions of the contract”
International Coffee Day (September 29) is an occasion to promote and celebrate coffee as a beverage, with events occurring in places across the world. A day to promote fair trade coffee and raise awareness for the coffee growers’ plight. Other countries celebrate this event on October 1.
