(chemistry, obsolete) A rejected name for dubnium. / (chemistry, obsolete) A rejected name for hassium.

haha (an onomatopoeic representation of laughter).

(parachuting) Acronym of high altitude, high opening.

plural of haha

A city in Georgia, United States.

plural of Hahnemannian

Of or relating to Christian Friedrich Samuel Hahnemann (1755–1843), German physician, or the alternative medicine of homeopathy that he founded.

A supporter of Hahnemann's theories regarding homeopathy.

plural of hahniid

(zoology) Any member of the family Hahniidae of dwarf sheet spiders.