Definition of antiprism
: a polyhedron having two faces that are identical polygons in parallel planes but rotated from each other while the other faces are a series of alternately oriented triangles These are the first clusters composed of centered square antiprisms of metal atoms. — Francis J. DiSalvo, Science, 9 Feb. 1990
antiprismatic\¦an-ˌtī-priz-¦ma-tik, ¦an-tē-\ play adjective The ytterbium environment, in keeping with the diminished ionic radius, is now eight-coordinate with a square-antiprismatic arrangement. — Glen B. Deacon et al., Canadian Journal Of Chemistry, 1 Jan. 2009
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up antiprism? Please tell us where you read or heard it (including the quote, if possible).