serif

In typography, a serif () is a small line or stroke regularly attached to the end of a larger stroke in a letter or symbol within a particular font or family of fonts. A typeface or "font family" making use of serifs is called a serif typeface (or serifed typeface), and a typeface that does not include them is sans-serif. Some typography sources refer to sans-serif typefaces as "grotesque" (in German, grotesk) or "Gothic" (although this often refers to blackletter type as well) and serif typefaces as "roman" (or in German, Antiqua).
Serif typefaces can be broadly classified into one of four subgroups: § old style, § transitional, § Didone and § slab serif, in order of first appearance. Some Old-style typefaces can be classified further into one of two subgroups: § Antiqua and § Dutch Taste.

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