cactoid
cactoid noun: a member of the cactus subfamily Cactoideae.
Noun
cactoid (plural cactoids)
- A member of the cactus subfamily Cactoideae.
- A locally connected continuum that is the closure of the union of an at most countable number of spheres and simple arcs, of which every simple closed contour is contained in one and only one of the spheres.
- It is well known that a Peano space is a cactoid if and only if each of its true cyclic elements is a 2-sphere.1951, John William Theodore Youngs, The Representation Problem for Fréchet Surfaces, page 27
Forms of cactoid
| plural | cactoids |
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Questions about cactoid
- What does cactoid mean?
- Cactoid means a member of the cactus subfamily Cactoideae.
- What part of speech is cactoid?
- Cactoid is a noun.
- What is the plural of cactoid?
- The plural of cactoid is cactoids.
Words near cactoid in the dictionary
Source and license
Adapted from Wiktionary: cactoid (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.
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