Sándor Hamvas May 9, 2019:

Köszönöm. Nagyrészt Katalin érdeme.

Sándor Hamvas May 7, 2019:

Katalin, Péter!
Köszönöm a megerősítést.

Péter Tófalvi (asker) May 7, 2019:

@Hamvas Sándor Na, ez már valami! :-)

Katalin Horváth McClure May 7, 2019:

Az az, stadium Sándor, tedd fel válasznak, mert erről van szó.

Sándor Hamvas May 7, 2019:

Pillar of stadium geometry, v. stadium shaped pill A Wiki és más források szerint létezik stadium geometry
https://en.wikipedia.org/wiki/Stadium_(geometry)
A stadium is a two-dimensional geometric shape constructed of a rectangle with semicircles at a pair of opposite sides.[1] The same shape is known also as a discorectangle,[2] obround,[3][4] or sausage body.[5]
The shape is based on a stadium, a place used for athletics and horse racing tracks.
A stadium may be constructed as the Minkowski sum of a disk and a line segment.[5] Alternatively, it is the neighborhood of points within a given distance from a line segment. A stadium is a type of oval. However, unlike some other ovals such as the ellipses, it is not an algebraic curve because different parts of its boundary are defined by different equations.
Lásd még:
https://rechneronline.de/pi/stadium.php; http://mathworld.wolfram.com/Stadium.html; https://math.stackexchange.com/questions/2678480/formula-for...

Péter Tófalvi (asker) May 7, 2019:

Az elipszis alakú szerintem angolul (semi)elliptical.
Találtam egy ilyen képet a Google-lel.

Aminek csak a sarkai vannak lekerekítve: rectangular round-nosed
A sima téglalap: rectangular square-nosed