| 单词 | tractrix |
| 释义 | tractrix /trak"triks/, n. , pl. tractrices /trak truy"seez, trak"treuh seez'/. Geom. a curve whose tangents are all of equal length; the involute of a catenary. [1720-30; < NL, equiv. to L trac-, var. s. of trahere to draw, pull + -trix -TRIX] |
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