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