conchoid


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conchoid

[′käŋ‚kȯid]
(mathematics)
A plane curve consisting of the locus of both ends of a line segment of constant length on a line which rotates about a fixed point, while the midpoint of the segment remains on a fixed curve which does not contain the fixed point.
References in periodicals archive ?
Eliminating [x.sub.1] and [x.sub.2] in the above three polynomial equations we get an implicit equation in u and v that describes the conchoid of Nicomedes (see [4] for a more technical specification).
If the wisdom of the infant imagination is an issue here, it is worth quoting Judith Chernaik, who, in a reading of Shelley's lyrics, takes note of "the affectionate nicknaming and play-acting in which the Shelley circle always indulged."(25) Ariel, Oberon, the Paladin: these are just a few of the alternative appellations for the poet--to say nothing as yet of that of "the Conchoid"--put into play by his set in the course of his life and career.
The non infectious granulomas are non caseating nacked sarcoid granulomas of unknown etiology with numerous activated macrophages, few lymphocytes and scattered asteroid body or conchoids body.