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dodecahedron

N ของแข็ง รูป  12เหลี่ยม 

 

Webster's 1828 Dictionary

DODECAHEDRON

n.[Gr. , twelve; a base. ] A regular solid contained under twelve equal and regular pentagons, or having twelve equal bases.

 

Webster's 1913 Dictionary

DODECAHEDRON

Do *dec `a *he "dron, n. Etym: [Gr. dodécaèdre.] (Geom. & Crystallog.)

 

Defn: A solid having twelve faces.

 

Note: The regular dodecahedron is bounded by twelve equal and regular pentagons; the pyritohedron (see Pyritohedron ) is related to it; the rhombic dodecahedron is bounded by twelve equal rhombic faces.

 

New American Oxford Dictionary

dodecahedron

do dec a he dron |dōˌdekəˈhēdrən ˌdoʊˌdɛkəˈhidrən | ▶noun ( pl. dodecahedrons or dodecahedra |-drə | ) a three-dimensional shape having twelve plane faces, in particular a regular solid figure with twelve equal pentagonal faces. DERIVATIVES do dec a he dral |-drəl |adjective ORIGIN late 16th cent.: from Greek dōdekaedron, neuter (used as a noun ) of dōdekaedros ‘twelve-faced. ’

 

Oxford Dictionary

dodecahedron

dodecahedron |ˌdəʊdɛkəˈhiːdr (ə )n, -ˈhɛd -| ▶noun ( pl. dodecahedra |-drə | or dodecahedrons ) a three-dimensional shape having twelve plane faces, in particular a regular solid figure with twelve equal pentagonal faces. DERIVATIVES dodecahedral adjective ORIGIN late 16th cent.: from Greek dōdekaedron, neuter (used as a noun ) of dōdekaedros ‘twelve-faced ’.