icosahedron是什么意思 icosahedron的用法 icosahedron怎么读

icosahedron

英 [,aɪkɒsə'hiːdrən; -'hed-]

n. [数] 二十面体

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英语词源

icosahedron (n.)

1560s, from Greek eikosahedron

, neuter of eikosahedros, from eikosi "twenty" + -hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit" (see sedentary). Greek eikosi is from PIE *wikmti- "twenty," from *wi- "in half," hence "two" + (d)kmti-, from root *dekm- "ten" (see ten).

权威例句

1. The last of these figures known to Plato is the icosahedron.

柏拉图知道的最后一个这种构形是正二十面体.

[ icosahedron 造句 ]