Bible Dictionaries
Heliogravure

Webster's Dictionary

(1):

(n.) A plate or picture made by the process of heliogravure.

(2):

(n.) The process of photographic engraving.

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