a symmetry element of a space group such that a reflection of the lattice with respect to the plane and a translation of the lattice parallel to the plane bring the lattice back to its original position.
Why are planes named after numbers, like the 747? Is there a 947 or a 658?
After World War II, one of the largest aircraft manufacturers, Boeing, turned its attention from designing military craft to building commercial planes, along with missiles and spaceships. (Unrelated fact: when Boeing was forced to spin off its passenger flight division, the newly-formed company became United Airlines. Back to the late 1940s: Model numbers were assigned to each division of aircraft (from the Boeing website:) “300s …
The United States of Diversity: Borders
by Taneesh Khera In April, 2018 I traveled to India for a college friend’s wedding. When I came back, I read part of this essay to two friends, and we began to discuss borders and what they’ve become today. That conversation was inspiration for this episode, so grab a cushion and get comfortable for the United States of Diversity: Borders.
Origin of glide plane
First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for glide plane
Historical Examples of glide plane
This plane, which truncates the edge of the rhombohedron and has the indices , is called a “glide-plane.”