American Heritage Dictionary
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WordNet
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So that space, number, continuity, and every other elementary intuition remains at bottom opaque--opaque, that is, to mathematical science; for it is no paradox, but an obvious necessity, that the data of a logical operation should not be producible by its workings.— The Life of Reason
So that space, number, continuity, and every other elementary intuition remains at bottom opaque -- opaque, that is, to mathematical science; for it is no paradox, but an obvious necessity, that the data of a logical operation should not be producible by its workings.— The Life of Reason
It is opaque, and many pieces are mottled.— The Lore of Gloranthan Gems and Near-Gems by Martin R. Crim Part II
Opaque has been looked up 545 times, favorited 0 times, listed 54 times, and commented on once.

American Heritage Dictionary (1)
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