Lentoid

Lentoid is a geometric shape of a three-dimensional body, best described as a circle viewed from one direction and a convex lens viewed from every orthogonal direction. It has no strict mathematical definition, but may be described as the volume enclosed within overlapping paraboloids.

Lentoid.

The term is most often used in describing jewelry and cellular phenomena in microbiology.

In history

Since ancient times, the lentoid shape has been used to fashion jewelry and seals for identification made from a variety of gemstones and metals. In Minoan Crete, for example, seals have been found with complex carving on lentoid stones.[1] The lentoid shape was one of the most commonly recovered seal shapes from Minoan Knossos on Crete dating to the Bronze Age, as evidenced by the finds at that Bronze Age palace.[2]

gollark: It converts words to some highly multidimensional vector based on its connections to other words, via magic.
gollark: That's not a hash function really; a small change in the input produces small output changes, which is basically the point.
gollark: A hash of the page *title*, I mean.
gollark: Isn't that pretty common?
gollark: Hmm, I wonder if it would be cool™ to make wikilinks different (HSL) colors based on a hash of the page being pointed to.

See also

References
  1. Timeline of Art History: Lentoid seal with a griffin, Minoan Crete
  2. C. Michael Hogan, Knossos fieldnotes, Modern Antiquarian (2007)
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