cissoid
cissoid noun: any of a family of curves defined as the locus of a point, P, on a line from a given fixed point and intersecting two given curves, C₁ and C₂, where the distance along the line from C₁ to P remains constant and equal to the distance from P to C₂. Also the alternative form of cisoid.
Noun
cissoid (plural cissoids)
- Any of a family of curves defined as the locus of a point, P, on a line from a given fixed point and intersecting two given curves, C₁ and C₂, where the distance along the line from C₁ to P remains constant and equal to the distance from P to C₂.
- The cissoid of a circle and a line is a conchoid
Also used as
cissoid is also the alternative form of cisoid.
Forms of cissoid
| plural | cissoids |
|---|
Origin of cissoid
From Ancient Greek κισσός (kissós, “ivy”) + εἶδος (eîdos, “form, image”).
From cis + -oid.
Questions about cissoid
- What does cissoid mean?
- Cissoid means any of a family of curves defined as the locus of a point, P, on a line from a given fixed point and intersecting two given curves, C₁ and C₂, where the distance along the line from C₁ to P remains constant and equal to the distance from P to C₂.
- What part of speech is cissoid?
- Cissoid is a noun.
- What is the plural of cissoid?
- The plural of cissoid is cissoids.
Words near cissoid in the dictionary
Source and license
Adapted from Wiktionary: cissoid (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-cissoid.wav, LL-Q1860 (eng)-Hitoubashira-cissoid.wav.
Cite this entry: “cissoid.” Word.ws, https://word.ws/cissoid. Based on Wiktionary, CC BY-SA 4.0.