- hundred_and_fifty_fifth
- hard paraffin
- hereditary thrombasthenia
- having faith (in)
- heat production
- humectant
- hydrogel
- how dare ! how can (you) muster courage to
- hard nut
- highly infective
- has eyes for
- having taken a vow
- henry louis gehrig
- hand_held microcomputer
- hand_held computer
- houdah
- having big attractive eyes
- high prestess
- having the lustre of gold
- heterochromia irides
- his nibs
- haemangiectasis
- haemamoeba
- horizontal deflection oscillation
- horizontal eye
- horizontal parallax
- horizontal tabulation character
- horizontal needle
- have a trick up sleeve
- horseleech
- henry le chatelier
- henry louis aaron
- hepatosis
- hornblende
- head of a
- have an axe to grind
- horizontal tomography
- hyaline layer
- health maintenance organization
- he that pays the piper calls the tune
- have the run of
- husbandly
- hinterland
- happening
- hypothalamic_ pituitary_adrenal axis
- high altar
- hypodontia
- head clerk
- hoffmans drop
- heat spot