Bible Dictionaries
Baptistry

Webster's Dictionary

(1):

(n.) In early times, a separate building, usually polygonal, used for baptismal services. Small churches were often changed into baptisteries when larger churches were built near.

(2):

(n.) A part of a church containing a font and used for baptismal services.

Bibliography Information
Webster, Noah. Entry for 'Baptistry'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/baptistry.html. 1828.