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n. pl. or·thog·ra·phies
1. The art or study of correct spelling according to established usage.
2. The aspect of language study concerned with letters and their sequences in words.
or·thog′ra·pher, or·thog′ra·phist n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.