Africa 
China 
Japan 
MENA 
- Helium-4
- Helix
- Helix QAC
- Helix angle
- Helix bundle
- Hellinger distance
- Helmholtz coils
- Helmholtz decomposition
- Helmholtz equation
- Helmholtz free energy
- Helmholtz resonance
- Helmholtz resonators
- Helminth
- Help
- Helvetica
- Hemagglutination
- Hemagglutination assay
- Hemagglutinin
- Hemangiomas
- Hemangiosarcoma
- Hematemesis
- Hematite
- Hematocrit
- Hematology
- Hematomas
- Hematopoietic
- Hematopoietic stem cell niche
- Hematopoietic stem cell transplantation
- Hematopoietic stem cells
- Hematopoietic system
- Hematoxylin
- Hematuria
- Heme a
- Heme b
- Heme c
- Heme oxygenase
- Hemiacetal
- Hemiaminal
- Hemianopsia
- Hemicellulose
- Hemihydrate
- Hemimorphite
- Hemin
- Hemipelagic
- Hemispherical combustion chambers
- Hemochromatosis
- Hemocue
- Hemocyanin
- Hemocytes
- Hemodialysis
- Hemodynamics
- Hemofiltration
- Hemoglobin
- Hemoglobin A
- Hemoglobinuria
- Hemolysin
- Hemolysis
- Hemolytic anemia
- Hemolytic-uremic syndrome
- Hemoperfusion
- Hemophilia
- Hemoproteins
- Hemoptysis
- Hemorrhage
- Hemorrhagic fever
- Hemorrhagic transformation
- Hemosiderin
- Hemosiderosis
- Hemostasis
- Hemothorax
- Hemozoin
- Hemp
- Hempcrete
- Henna
- Henry
- Henry Hub
- Henry reaction
- Henry's Law
- Hep G2
- HepG2
- Heparan sulfate
- Heparin
- Heparin-induced thrombocytopenia
- Hepatectomy
- Hepatic arterial infusion
- Hepatic artery
- Hepatic encephalopathy
- Hepatic portal system
- Hepatic stellate cells
- Hepatic vein
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Hepatitis D
- Hepatitis E
- Hepatoblastoma
- Hepatocellular adenoma
- Hepatocellular carcinoma
- Hepatocytes
- Hepatomegaly
- Hepatoprotective
- Hepatorenal syndrome
- Hepatosplenomegaly
- Hepatotoxicity
- Hepatotoxin
- Hepcidin
- Hephaestin
- Heptacene
- Heptachlor
- Heptagon
- Heptanal
- Heptane
- Heptanol
- Herbertsmithite
- Herd immunity
- Herderite
- Hereditary
- Hereditary angioedema
- Hereditary spherocytosis
- Heredity
- Heritability
- Hermann-Mauguin notation
- Hermaphrodites
- Hermetic seal
- Hermetically sealed
- Hermite interpolation
- Hermite normal form
- Hermite polynomials
- Hermite spline
- Hermite transform
- Hermitian
- Hermitian matrix
- Herniated disc
- Heron's formula
- Herpes
- Herpesviridae
- Herringbone gear
- Herringbone pattern
- Hertz
- Hertzian cone
- Hes1
- Hesperetin
- Hesperidin
- Hesse normal form
- Hessenberg matrix
- Hessian
- Hessian matrix
- Heterarchy
- Heteroatoms