| 单词 | cissoid |
| 释义 | Word Frequency cissoid(ˈsɪsɔɪd) noun 1. a geometric curve whose two branches meet in a cusp at the origin and are asymptotic to a line parallel to the y -axis. Its equation is y2(2a – x)=x3 where 2a is the distance between the y-axis and this line adjective 2. contained between the concave sides of two intersecting curves Compare sistroid Word origin C17: from Greek kissoeidēs, literally: ivy-shaped, from kissos ivy |
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