| 单词 | gnomon |
| 释义 | gnomon /noh"mon/, n. 1. the raised part of a sundial that casts the shadow; a style. See illus. under sundial. 2. an early astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon. 3. Geom. (formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners. [1540-50; < L gnomon pin of a sundial < Gk gnómon lit., interpreter, discerner] |
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