Africa 
China 
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MENA 
- Kappa opioid receptor
- Kappa statistics
- Karl Fischer titration
- Karnofsky Performance Status
- Karoshi
- Kartagener syndrome
- Karyogamy
- Karyokinesis
- Karyolysis
- Karyopherin
- Karyorrhexis
- Karyotype
- Karyotyping
- Kasabach-Merritt syndrome
- Kasai procedure
- Kashin-Beck disease
- Kassinin
- KatG
- Kaurenoic acid
- Kava
- Kavain
- Kavalactones
- Kawasaki disease
- Kawasaki syndrome
- Kayser-Fleischer ring
- Kdm3b
- Kdm5a
- Kdm5b
- Kearns-Sayre Syndrome
- Kearns-Sayre syndrome
- Kefauver-Harris Amendment
- Kegel exercises
- Kehr's sign
- Kell
- Keloids
- Kendall rank correlation coefficient
- Keratan sulfate
- Keratin
- Keratin 1
- Keratin 13
- Keratin 14
- Keratin 17
- Keratin 18
- Keratin 4
- Keratin 6A
- Keratin pearl
- Keratinase
- Keratinization
- Keratinocyte growth factor
- Keratinocytes
- Keratins
- Keratitis
- Keratitis-ichthyosis-deafness syndrome
- Keratoacanthoma
- Keratoconjunctivitis
- Keratoconjunctivitis sicca
- Keratoconus
- Keratocyst
- Keratocytes
- Keratoderma
- Keratoglobus
- Keratohyalin
- Keratolytics
- Keratomalacia
- Keratometer
- Keratomileusis
- Keratopathy
- Keratoplasty
- Keratoprosthesis
- Keratosis
- Keratosis follicularis spinulosa decalvans
- Keratosis pilaris
- Kerion
- Kerley lines
- Kerma
- Kernel density estimation
- Kernel methods
- Kernel smoother
- Kernicterus
- Kernig's sign
- Kernohan's notch
- Kerosene
- Kerteszia
- Keshan disease
- Ketal
- Ketamine
- Ketazocine
- Ketazolam
- Ketene
- Keto enol tautomerism
- Ketoacidosis
- Ketoacyl synthase
- Ketobemidone
- Ketoconazole
- Ketodarolutamide
- Ketogenesis
- Ketogenic amino acids
- Ketohexokinase
- Ketolysis
- Ketone bodies
- Ketones
- Ketonuria
- Ketoprofen
- Ketorolac
- Ketosis
- Ketosis-prone diabetes
- Ketotic hypoglycemia
- Ketotifen
- Kexin
- Khat
- Khellin
- Khusimol
- Ki-67
- Kiddie Schedule for Affective Disorders and Schizophrenia
- Kidney
- Kidney beans
- Kidney biopsy
- Kidney cancer
- Kidney cortex
- Kidney cyst
- Kidney development
- Kidney disease
- Kidney failure
- Kidney glomerulus
- Kidney infection
- Kidney ischemia
- Kidney medulla
- Kidney pelvis
- Kidney stones
- Kidney transplant
- Kidney tubule
- Kidney tubules
- Kiesselbach's plexus
- Kikuchi disease
- Killip class
- Kin selection
- Kinanthropometry
- Kinase inhibitors
- Kinase insert domain receptor
- Kinases
- Kindler syndrome
- Kinect
- Kinesin
- Kinesiology
- Kinesthesia
- Kinetic isotope effect
- Kinetic resolution
- Kinetic scheme
- Kinetics
- Kinetin