Che‐mig″ra‐phy (?), n. [Chemical + -graphy.] Any mechanical engraving process depending upon chemical action; specif., a process of zinc etching not employing photography. — Chem′i‐graph″ic (#), a.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.