WordReference Random House Unabridged Dictionary of American English © 2026
moon′ let′ter, Arabic Gram.
- Linguisticsany letter, as bā or mīm, representing a consonant that does not assimilate the l of a prefixed definite article. Cf. sun 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
'moon letter' also found in these entries (note: many are not synonyms or translations):