- 1七邊形的
Heptagonal is the describing word for a . If something is heptagonal, it has seven straight sides, or it is shaped like that seven-sided figure. So is the shape itself; heptagonal tells you what kind of thing you are looking at: a heptagonal coin, a heptagonal table. The gloss “a shape with seven straight sides” names the noun. The word in front of you is the adjective built from that noun. It is a maths and design word. In speech most people still say seven-sided.
組成heptagon + -al (makes an adjective: of or like a heptagon). Used since the 16th century.
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
heptagonaladj/hɛpˈtæɡənəl/
- 1
Having seven angles and sides.
- 2
mathematicssciencesBelonging to the sequence generated by the formula (5n²-3n)/2.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。