| Placidyl |
ethchlorvynol: a mild sedative-hypnotic drug (trade name Placidyl)
출처: wordnet.princeton.edu/perl/webwn
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| Placido's d. |
a keratoscope.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Placido's disk |
[Antonio Placido, Portuguese ophthalmologist, 1848?1916] A disk marked with concentric black and white circles used in determining the amount and character of corneal irregularity.
출처:
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