Serif
From Wiki @ Karl Jones dot com
In typography, a serif /ˈsɛrɪf/ is a small line attached to the end of a stroke in a letter or symbol.
Description
A typeface with serifs is called a serif typeface (or serifed typeface). A typeface without serifs is called sans serif or sans-serif, from the French sans, meaning "without."
Some typography sources refer to sans-serif typefaces as "Grotesque" (in German "grotesk") or "Gothic", and serif typefaces as "Roman."