| 单词 | test letter |
| 释义 | > as lemmastest letter test letter n. (a) a letter sent as a test of the honesty of the messenger; (b) see test-type n. ( C.D., Suppl. 1909). ΘΚΠ society > communication > correspondence > letter > [noun] > other types of letter billet-doux1673 poulet1691 treble letter1753 round robin1755 screed1834 tickler1846 application letter1850 test letter1869 letter of envoy1873 hastener1922 fan letter1932 aerogram1933 yum-yum1943 newsletter1961 overnights1975 the world > health and disease > healing > ophthalmology or optometry > [noun] > kinds of eye-test > letters used in testing sight test-type1864 test letter1869 1869 Trans. Amer. Ophthalmol. Soc. 4th & 5th Ann. Meeting 68 (heading) On a new series of test-letters for determining the acuteness of vision. 1897 Daily News 14 Apr. 7/5 The prisoner [a postman] was suspected. A test letter was sent, and it was not delivered. 1970 A. H. Keeney Ocular Exam. ii. 18/2 Snellen's real contribution was to standardize the size and form of test letters with relation to the distance from the observer. < as lemmas |
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