| 单词 | directrix |
| 释义 | directrix /di rek"triks, duy-/, n. , pl. directrixes, directrices /di rek"tri seez', duy-, duy'rek truy"seez/. 1. Geom. a fixed line used in the description of a curve or surface. See diag. under parabola. 2. Archaic. a directress. [1615-25; < NL; see DIRECT, -TRIX] Usage. See -trix. |
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