As nouns the difference between cactoid and factoid
is that cactoid is a member of the cactus subfamily cactoideae while factoid is an inaccurate statement or statistic believed to be true because of broad repetition, especially if cited in the media.
cactoid
English
Noun
(
en noun)
A member of the cactus subfamily Cactoideae.
(topology)
* 1951 , John William Theodore Youngs, The Representation Problem for Fréchet Surfaces (page 27)
- 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.
factoid
English
Noun
(
en noun)
An inaccurate statement or statistic believed to be true because of broad repetition, especially if cited in the media.
An interesting item of trivia.