h_0

H0 (H followed by zero) or H00 may refer to: H0 scale, used in rail transport modelling Higgs boson, in physics, symbol H0 Hammett acidity function, in chemistry, H0 Hubble constant, in cosmology, H0 Null hypothesis, in statistics, often denoted H0 HMS Comet (H00), a British and later Canadian warship Stye, a bacterial infection of the eyelid, ICD-10 code H00