Noun
- The eighth letter of the English alphabet.
- (chemistry) symbol for hydrogen
- (physics) symbol for a henry, a unit for measurement of electrical inductance
- (slang) term for [heroin].
H -- Ha Hb Hc Hd He Hf Hg Hh Hi Hj Hk Hl Hm Hn Ho Hp Hq Hr Hs Ht Hu Hv Hw Hx Hy Hz