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Use "graphemes" in a sentence
"The fundamental components of any literary articulation — as a babbling in sound or a squiggling in ink — are phonemes or graphemes, verbal or visual figurae."
"Then the child may begin to map graphemes onto phonemes."
"In one of the most common forms of synesthesia, grapheme → color synesthesia, individual letters of the alphabet and numbers (collectively referred to as graphemes), are "shaded" or "tinged" with a color."