biconvex
Example Sentences
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The red blood-corpuscles are invariably oval disks, with a central nucleus which causes a slight swelling; hence they are oval and biconvex.
From Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" by Various
The crystalline lens is a transparent, biconvex body sustained by the ciliary processes.
From Common Diseases of Farm Animals by Craig, R. A., D. V. M.
I then examined the fittings of this mechanism, whose power was increased a hundredfold by biconvex lenses that were designed like those in a lighthouse and kept its rays productively focused.
From Twenty Thousand Leagues Under the Sea by Walter, F. P.
Set in the cabin's walls were four deadlights, windows of biconvex glass that enabled the man at the helm to see in every direction.
From Twenty Thousand Leagues Under the Sea by Walter, F. P.
"My helmsman is stationed behind the windows of a pilothouse, which protrudes from the topside of the Nautilus's hull and is fitted with biconvex glass."
From Twenty Thousand Leagues Under the Sea by Walter, F. P.