pentagonohedronn.
/ˌpɛntəɡ(ə)nəˈhiːdr(ə)n/, U.S. /ˈˌpɛn(t)əˌɡɑnəˈhidr(ə)n/ rare.
A solid figure having pentagonal plane faces. twelve-pentagonohedron, a dodecahedron of this form (cf. pentagon-dodecahedron n.).
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the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > contained by pentagons
pentadodecahedron1869
pentagon-dodecahedron1895
pentagonohedron1895
1895 N. Story-Maskelyne Crystallogr. §183 The pentagon-dodecahedron... The twelve-pentagonohedron is a very characteristic form of certain mineral species.
1962 Science 5 Jan. 11/2 What does a traveler prove when he journeys around the earth without encountering sharp edges? The answer is that the traveler proves that the earth is not a pyramid, a cube, or a pentagonohedron.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).
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n.1895