- Joint capsule
- Joint contracture
- Joint dislocation
- Joint distribution
- Joint effusion
- Joint manipulation
- Joint mobilization
- Joint probability
- Joint replacement
- Joint stability
- Joint stiffness
- Joint swelling
- Jojoba
- Josamycin
- Joubert syndrome
- Joule Thomson effect
- Juglans regia
- Jugular foramen
- Jugular fossa
- Jugular tubercle
- Jugular vein
- Jugular venous pressure
- Jugulodigastric lymph nodes
- Jujube
- July effect
- Jumping
- Jumping jacks
- Jumping to conclusions
- JunD
- Junb
- Junctional diversity
- Junctional epidermolysis bullosa
- Junctional epithelium
- Junctional nevus
- Junctional rhythm
- Junctional tachycardia
- Juncus effusus
- Junin virus
- Juniper berry
- Juniperus communis
- Junk DNA
- Jurkat cells
- Just-world hypothesis
- Justifiable homicide
- Juvenile
- Juvenile Polyposis Syndrome
- Juvenile arthritis
- Juvenile dermatomyositis
- Juvenile idiopathic arthritis
- Juvenile myelomonocytic leukemia
- Juvenile myoclonic epilepsy
- Juvenile nephronophthisis
- Juvenile osteoporosis
- Juvenile polyposis syndrome
- Juvenile primary lateral sclerosis
- Juvenile rheumatoid arthritis
- Juvenile xanthogranuloma
- Juvenile-hormone esterase
- Juxtacrine signalling
- Juxtaglomerular apparatus
- Juxtaglomerular cells
- K complexes
- K-NFB Reader
- K-SADS
- K-casein
- K-edge
- K-hole
- K-mer
- K252a
- K562 cells
- KCNA4
- KCNC1
- KCNE2
- KCNJ10
- KCNJ2
- KCNJ5
- KCNK3
- KCNMA1
- KCNMB1
- KCNN4
- KCNQ1
- KCNQ1OT1
- KCNQ2
- KCNQ3
- KCNQ4
- KCNS3
- KCNT1
- KCNT2
- KD
- KDEL
- KDM2A
- KDM3A
- KDM3B
- KDM4B
- KDM5A
- KDM5C
- KDM6B
- KEGG
- KH domain
- KIF5B
- KIF7
- KIR2DL4
- KIR2DS1
- KIR3DL2
- KLF1
- KLF10
- KLF11
- KLF12
- KLF14
- KLF15
- KLF2
- KLF4
- KLF5
- KLF8
- KLF9
- KLH
- KLK1
- KLK7
- KLKB1
- KMT2C
- KMT2D
- KNN
- KOH test
- KRAS
- KRT8
- Kabuki syndrome
- Kaempferia galanga
- Kaempferol
- Kaempferol 3-O-rutinoside
- Kahweol
- KaiA
- KaiC
- Kainate receptors
- Kainic acid
- Kairomone
- Kala-azar
- Kalanchoe
- Kaliuresis
- Kallidin
- Kallikrein
- Kallikrein kinin system
- Kallmann syndrome
- Kama
- Kampo
- Kanamycin
- Kangaroo care
- Kaolin
- Kaolinite
- Kaplan-Meier method
- Kaposi's sarcoma