Definition - In typography, a serif typeface is one that has fine strokes — called serifs — at the ends of its letters.

Etymology -
The word perhaps derives from the Dutch schreef, a line or a stroke.

Oxford English Dictionary -
Its first citation is from 1841:
"The fine lines, and the cross strokes at the tops and bottoms of letters, are termed by the letter founders ceriphs."
(Savage, Dictionary of Printing, 163)

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