Answer: ency

AnswerCrossword Clue
ENCY

Ref. work

ENCY

Large ref. work

ENCY

Reference bk.

ENCY
"Wikipedia", for ex.
ENCY
Suffix with consist
ENCYDepend add-on
ENCYRef. book
ENCYWikipedia, for one (abbr.)
ENCYBritannica, for one (abbr.)
ENCY"World Book", e.g.: Abbr.
ENCYNoun suffix.
ENCYReference book: Abbr.
ENCYReference work: Abbr.
ENCYRef. book.
ENCYComprehensive work: Abbr.
ENCYNoun suffix
ENCYRef. set
ENCYSuffix with depend
ENCYSuffix with "depend"
ENCYSuffix with "consist"