- Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
- Perseus: Lane's Lexicon (in text format)
- hdhd (if it is not found in the link above)
The root hdhd (ه د ه د) occurs 1 times in Quran, in 1 derived forms:
And [one day] he looked in vain for [a particular one of] the birds; and so he said: How is it that I do not see the hoopoe? Or could he be among the absent?