bilunabirotunda

B3I1L1U1N1A1B3I1R1O1T1U1N1D2A1

noun

A polyhedron, one of the Johnson solids, having 8 triangular, 2 square, and 4 pentagonal faces.

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Meanings

noun
  1. mathematicsA polyhedron, one of the Johnson solids, having 8 triangular, 2 square, and 4 pentagonal faces.

    ...and investigated the effects of different particle shapes, including sphere, cube, bilunabirotunda, and hexagonal prism.

    2025, Ajit S. Narang, Sherif I.F. Badawy, Handbook of Pharmaceutical Wet Granulation: Theory and Practice in a Quality by Design Paradigm, page 786

Origin

From bi- + luna + bi- + rotunda. Coined by Norman W. Johnson in 1969.

Full word history & related roots →

Translations

Spanish bilunabirrotonda
  • bilunabirrotondapolyhedron
Cite this entry
APA

bilunabirotunda. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/bilunabirotunda

MLA

“bilunabirotunda.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/bilunabirotunda. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “bilunabirotunda,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/bilunabirotunda.

Source: bilunabirotunda on Wiktionary, CC BY-SA 4.0.