The dot over the top of a lowercase letter i is called a tittle
The bits on the ends of shoelaces are called aglets.
I knew that! (No I didn't)
Did you ever wonder what the WD in WD-40 stands for?
The name was lifted right out of chemist Norm Larsen's laboratory notebook. Way back in 1953, he was trying to concoct an anti-corrosion formula, which worked on the basic principle of displacing water.
On his 40th try, Larsen finally got it right. Hence the name WD-40. It literally means Water Displacer, 40th try.
I wonder how someone discovered this little fascinating bit. Can just see some poor guy sitting there multiplying numbers year after year after year and then finally, HOORAY! GOT IT!
The pound weight measure word in Spanish = "Libra" is the identical same as the zodiac sign "Libra" (the scales), so lb abbreviation seems quite natural to Spanish speakers.