nonagon
n.
"plane figure with nine sides," 1680s, a hybrid from Latin nonus "ninth" (see nones) + ending from pentagon, etc.
| 词汇 | nonagon |
| 词根词缀 | Online Etymology Dictionary nonagon n. "plane figure with nine sides," 1680s, a hybrid from Latin nonus "ninth" (see nones) + ending from pentagon, etc. |
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