One of the mysteries of the English language finally explained.
From memory, by heart.
Spoken or speaking memoriter; making use of memorization.
Early 17th century; earliest use found in John Brinsley (bap. 1566, d. c1624), schoolmaster and writer on education. From classical Latin memoriter with a good recollection, accurately from memor mindful + -ter, suffix forming adverbs.
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