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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a closed convex surface. The term “ovaloid” is often taken to mean a regular closed convex surface, that is, a surface with continuous curvature. If the requirement of regularity is removed, the term “generalized ovaloid” is used.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.