moon letter
- any letter, as bā or mīm, representing a consonant that does not assimilate the l of a prefixed definite article.
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Compare sun letter.
Origin of moon letter
translation of Arabic al-ḥuruf al-qamorīyah, so called from the use of al-qamar (the moon) to illustrate nonassimilation of l in al the
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018