letters of graduated sizes used by opticians in testing sight.
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| 单词 | θ16328 |
| 释义 | the world > health and disease > healing > ophthalmology or optometry > [noun] > kinds of eye-test > letters used in testing sight (2) test-type1864 letters of graduated sizes used by opticians in testing sight. test letter1869 (a) a letter sent as a test of the honesty of the messenger; (b) see test-type n. (C.D., Suppl. 1909). |
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