| 单词 | geometric pen |
| 释义 | > as lemmasgeometric pen geometric pen n. now rare a mechanical instrument for use in drawing curved or intricate patterns.The instrument consists of a tripod that is stood on the paper; from it is suspended a short shaft bearing a horizontal arm with sliding members and cogged wheels, and with the pen at the tip. ΚΠ 1791 G. Adams Geom. & Graphical Ess. p. ii Suardi's geometric pen, an instrument not known in this country..whose curious properties will exercise the ingenuity of mechanics and mathematicians. 1829 Mechanics' Mag. 30 May 243/1 I derived no assistance from the geometric pen; for I did not even know there was such an instrument. 1909 Nature 25 Nov. 96/2 Mr. Richard Kerr describes a form of geometric pen, capable of producing very beautiful patterns. 1960 Pop. Sci. Sept. 16/2 We don't care if it is a rose engine or a geometric pen, it works. < as lemmas |
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