the plane containing the circle of curvature of a point on a given curve.
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 …
Keep it Classy: Fancy Words For Everyday ActivitiesHumming (is so boring) Yet, bombinating sounds much more interesting! This word may sound a bit like bumblebee, which is kind of neat as it means “to hum, or buzz.” First published in the late 1800s, bombinate and bombilate are twins with family-tree roots tangled in both Greek and Latin derivatives (confusing) that lead to the late Latin bombilāre, or “to hum.” Breathing (is so …
- osculating circle,
Origin of osculating plane
First recorded in 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019