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单词 opal plate
释义

> as lemmas

opal plate
opal plate n. a plate of opal glass; esp. (formerly) one used as a photographic plate (obsolete).
ΚΠ
1876 Scribner's Monthly Nov. 138/1 The opal plate and the print..are immersed in water.
1933 Philos. Trans. (Royal Soc.) B. 222 137 The 3 cm. hole in the bottom of the vessel..was closed by the opal plate.
1978 Science 23 June 1393/1 A dark-adapted frog retina was mounted in a double window chamber with an opal plate.
extracted from opaln.adj.
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