英语词汇“opisometer”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

opisometer

/ˌɒpɪˈsɒmɪtə/

noun

A hand-held instrument for measuring the length of curved lines, especially on a map, usually having at its tip a small rotating wheel that is rolled along the line to be measured; a map-measurer.

Originally the wheel turned on a screw and had to be rolled backwards along a straight scale until it reached its former position on the screw. The reading is now shown directly on a dial or digital display..

Origin

Mid 19th century. From ancient Greek ὀπίσω backwards (from ὀπι- + a suffix forming adverbs indicating direction) + -meter.

单词	opisometer
释义	opisometer /ˌɒpɪˈsɒmɪtə/ noun A hand-held instrument for measuring the length of curved lines, especially on a map, usually having at its tip a small rotating wheel that is rolled along the line to be measured; a map-measurer. Originally the wheel turned on a screw and had to be rolled backwards along a straight scale until it reached its former position on the screw. The reading is now shown directly on a dial or digital display.. Origin Mid 19th century. From ancient Greek ὀπίσω backwards (from ὀπι- + a suffix forming adverbs indicating direction) + -meter.
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