Three Dots, in Writing
Puzzle 16 of Groups of Three Easy Pack
Question is: Three Dots, in Writing
and the answer is: ELLIPSIS
Word Meaning:
ELLIPSIS — (typography, mathematics) A mark consisting of multiple full stops (with or without spaces), used to indicate omitted, missing, or illegible words; or (in mathematics) that a pattern continues.
Definitions from Wiktionary.