A hard urinary calculus composed of calcium oxalate; it can be smooth or covered with minute sharp spines.
tonsil stonesRead more in this article about some frequently asked questions and fun facts related to our definitions.
Why are zero and the letter “O” both circles? The answer involves both science and mysticismLong, long ago, typewriters made no distinction between the number 0 and the letter O. While the two share the same shape, the origin of both number and letter are quite different. Let’s look at the distinct astrological and optical inspirations that created these seemingly identical symbols. Derived from the Semitic letter ayin and inspired by the circular eye-shaped Egyptian hieroglyph for “eye,” the letter O …
- ox-tongue partisan,
- oxalic acid,
- oxaloacetic acid
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.