Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The curve traced out by points P and P′ which lie on lines through a fixed point A where the midpoint M of PP′ is on a fixed line and the absolute value |PM| = the absolute value |P′M| = the absolute value |MO|, where O is the projection of A onto that fixed line.
from The Century Dictionary.
- noun A nodal plane cubic curve which is the locus of a focus of a conic whose directrix and two tangents are given.
- noun A curve which is the locus of intersections of two lines rotating uniformly with commensurable velocities. See also
suhstrophoid .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Greek strophos, twisted cord (from strephein, to turn; see streb(h)- in Indo-European roots) + –oid.]
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Examples
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Common decency and good taste prevents us from displaying Freeth’s supertrisectrix strophoid.
Rambles at starchamber.com » Blog Archive » Imaginary Law Firms, Part 1: Brannock, Foley, and Freeth 2008
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But Freeth’s nephroid is something altogether different: a strophoid of a circle with a double curlicue in the kidney crotch.
Rambles at starchamber.com » Blog Archive » Imaginary Law Firms, Part 1: Brannock, Foley, and Freeth 2008
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