pinacoidal

adjective

pin·​a·​coi·​dal

variants or less commonly pinakoidal

¦⸗⸗¦kȯidᵊl

: having only a center of symmetry

—used of one class in the triclinic system see crystallization, symmetry

Word History

Etymology

International Scientific Vocabulary pinacoid + -al

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now