- Ha
- Ha
- HA
- Haab reflex
- Haab striae
- HAAg
- HAART
- HAART attack
- habena
- habenae
- habenal
- habenar
- habenula
- habenulae
- habenular
- habenular commissure
- habenular nucleus
- habenular trigone
- habenula urethralis
- habenulo-interpeduncular tract
- Haber-Weiss reaction
- habilitation
- habit
- habit deformity nail
- habit disorder
- habit scoliosis
- habit spasm
- habit tic
- habit-tic deformity
- habit training
- habitual abortion
- habitual centric occlusion
- habitual dislocation
- habitual occlusion
- habituation
- habitus
- HACCP
- HACEK
- hachement
- hacking cough
- HAD
- hadron
- hadron therapy
- Haeckel's law
- Haeckel law
- haem-
- Haemadipsa
- Haemadipsa ceylonica
- Haemagogus
- Haemaphysalis
- haemat-
- haemato-, haemat-
- Haemophilus
- Haemophilus aegyptius
- Haemophilus aphrophilus
- Haemophilus ducreyi
- Haemophilus influenzae
- Haemophilus influenzae type b
- Haemophilus influenzae type b vaccine
- Haemophilus parainfluenzae
- Haemophilus vaginalis
- Haemosporidia
- Haff disease
- hafnium
- Hagedorn needle
- Hageman factor
- Haglund deformity
- hag phenomenon
- Hahnemann, Samuel
- hahnium
- HAI
- Hailey-Hailey disease
- hair
- hair analysis, hair specimen analysis
- hair ball
- hairball, hair ball
- hair bulb
- hair cell
- hair collar sign
- hair follicle
- hair germ
- hairline fracture
- hair prosthesis
- hair shaft
- hair sinus
- hair specimen analysis
- hair transplantation
- hairy cell leukemia
- hairy nevus
- hairy tongue
- Hakim-Adams syndrome
- halal
- halation
- halazone
- Haldane effect
- half-life
- half pack
- half sibling
- half-value layer
- half-value thickness, half-value layer
- half vision
- halfway house
- halibut liver oil
- halide
- halisteretic pelvis
- halitophobia
- halitosis
- halitus
- Halle point
- Haller's anastomotic circle
- Haller anastomotic circle
- Hallervorden-Spatz disease, H.-S. syndrome
- hallex
- hallices
- Hallpike-Dix maneuver
- Hallpike maneuver, Hallpike-Dix maneuver
- halluces
- hallucination
- hallucinatory neuralgia
- hallucinogen
- hallucinogen persisting perception disorder
- hallucinosis
- hallus
- hallux, hallus
- hallux dolorosus
- hallux limitus
- hallux malleus
- hallux rigidus
- hallux valgus
- hallux varus
- halo
- halodermia
- halo effect
- halogen
- halogen acne
- haloid
- halo nevus
- haloperidol
- halophilic
- halo symptom
- halothane
- halo vest
- halo vest orthosis
- Halsted, William Stewart
- Halsted forceps
- Halsted operation
- Halsted suture
- halzoun
- ham
- hamartoma
- hamartomatosis
- hamate
- hamate bone
- hamatum
- hamaxophobia
- hamburger sign
- Hamman, Louis
- Hamman's disease
- Hamman's syndrome
- hammer
- hammer finger
- hammer nose
- hammer toe
- hammertoe, hammer toe
- HAMRSA
- hamster
- Hamster zona-free ovum test
- hamstring
- hamstring muscles
- hamstring tendon
- Ham test
- hamular
- hamuli
- hamulus
- hamulus cochleae
- hamulus lacrimalis
- hamulus pterygoideus
- hand
- hand-arm vibration syndrome
- hand bandage
- hand decontamination
- H and E
- handedness
- hand-eye coordination
- hand field
- hand-foot-and-mouth disease
- hand-held
- handheld, hand-held
- hand hygiene
- handicap
- hand ischemic steal
- hand muscles
- handoff
- handover
- handrub
- Hand-Schüller-Christian disease
- handsock
- hands-on assistance
- hands-only CPR
- hand syringe
- handwashing
- handwriting
- hanging block culture
- hanging drop
- hanging drop culture
- hangman's fracture
- hangnail
- hang nail
- hangover
- Hansch analysis
- Hansen, Gerhard Henrik Armauer
- Hansen bacillus
- Hansen disease
- Hantavirus
- hantavirus cardiopulmonary syndrome
- hantavirus pulmonary syndrome
- H antigen
- Hapalochaena
- hapalonychia
- haphalgesia
- haphephobia
- haplo-compatible
- haplodont
- haploid
- haploid nucleus
- haploidy
- haploinsufficient
- haplopia
- haplo-transplant
- haplotype
- HapMap
- happiness
- happy life expectancy
- Hapsburg lip
- hapten, haptene, haptin
- haptene
- haptic
- haptic hallucination
- haptics
- haptin
- haptoglobin
- Harada-Mori culture
- hard cancer
- Hardcastle syndrome
- hard chancre
- hard contact lens
- hard drug
- hardening
- hardening of the arteries
- hardiness
- hard keratin
- hard metal disease
- hardness
- hardness number
- hardness test
- hard palate
- hard papilloma
- hard paraffin
- hard ray
- hard solder
- hard sore
- hard tissue
- hard water
- hardy
- harelip
- harelip suture
- Hare psychopathy checklist
- harlequin fetus
- harlequin sign
- harm
- harmaline
- harmful algal bloom
- harmful drinking
- Harmonia axyridis
- harmonic
- harmonic scalpel
- harmonic suture
- harmony
- harness
- Harpagophytum procumbens
- harpoon
- Harrison groove
- Harrison Narcotic Act
- harsh cough
- Hartmann procedure
- Hartmann solution
- Hartnup disease
- harvest
- harvest mite
- Harvey, William
- Hashimoto thyroiditis
- hashish
- Hasner valve
- Hassall corpuscle
- Hatchcock sign
- hatching
- Hatha yoga
- haunch
- haustra
- haustral
- haustration
- haustrum
- HAV
- Haverhill fever
- Havers, Clopton
- haversian canal
- Haversian canal
- haversian canaliculus
- haversian gland
- haversian glands
- haversian lamella
- haversian system
- Havrix
- Hawkins test
- hawthorn
- Hawthorne effect
- hay fever
- Hayflick limit
- Haygarth deformities
- Haygarth nodes
- hazard analysis and critical control point
- hazard function
- hazardous material
- hazardous waste
- hazard quotient
- hazard ratio
- haze
- hazmat