Hastings' Dictionary of the Bible
EASTER (AV [Note: Authorized Version.] of Acts 12:4; RV [Note: Revised Version.] ‘the Passover’). The anachronism of AV [Note: Authorized Version.] was inherited from older VSS [Note: SS Versions.] which avoided, as far as possible, expressions which could not be understood by the people.
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Hastings, James. Entry for 'Easter'. Hastings' Dictionary of the Bible. https://www.studylight.org/dictionaries/eng/hdb/e/easter.html. 1909.