- Lanugo
- Lapacho
- Lapachol
- Laparoscopic cholecystectomy
- Laparoscopic hernia repair
- Laparoscopic radical prostatectomy
- Laparoscopic surgery
- Laparoscopy
- Laparotomy
- Lapatinib
- Laquinimod
- Larazotide
- Larazotide acetate
- Lard
- Large B-cell lymphoma
- Large cell
- Large cell carcinoma
- Large cell neuroendocrine carcinoma
- Large deformation diffeomorphic metric mapping
- Large for gestational age
- Large granular lymphocyte
- Large granular lymphocytic leukemia
- Large intestine
- Large-cell lymphoma
- Large-scale brain networks
- Lariciresinol
- Laricitrin
- Larmor frequency
- Laron syndrome
- Laropiprant
- Larsen syndrome
- Larva currens
- Larva migrans
- Larvicides
- Laryngeal cancer
- Laryngeal cartilages
- Laryngeal cavity
- Laryngeal cleft
- Laryngeal inlet
- Laryngeal mask airway
- Laryngeal papillomatosis
- Laryngeal ventricle
- Laryngeal vestibule
- Laryngectomy
- Laryngitis
- Laryngocele
- Laryngology
- Laryngomalacia
- Laryngopharyngeal reflux
- Laryngoscope
- Laryngoscopy
- Laryngospasm
- Laryngotomy
- Laryngotracheal reconstruction
- Laryngotracheal stenosis
- Laryngotracheitis
- Laryngotracheobronchitis
- Larynx
- Laser Doppler imaging
- Laser Doppler vibrometry
- Laser ablation
- Laser beams
- Laser capture microdissection
- Laser coagulation
- Laser doppler flowmetry
- Laser doppler imaging
- Laser guidance
- Laser hair removal
- Laser lithotripsy
- Laser medicine
- Laser photocoagulation
- Laser radiation
- Laser skin resurfacing
- Laser surgery
- Lasmiditan
- Lasofoxifene
- Lassa fever
- Lassa virus
- Latah
- Latanoprost
- Late bloomer
- Late effects
- Late life depression
- Late proteins
- Late talker
- Late termination of pregnancy
- Late-term abortion
- Latency stage
- Latent autoimmune diabetes
- Latent autoimmune diabetes in adults
- Latent homosexuality
- Latent inhibition
- Latent iron deficiency
- Latent period
- Latent profile analysis
- Latent tuberculosis
- Latent variables
- Lateral
- Lateral cervical nucleus
- Lateral cord
- Lateral corticospinal tract
- Lateral cricoarytenoid muscle
- Lateral epicondyle
- Lateral epicondyle of the femur
- Lateral epicondyle of the humerus
- Lateral femoral cutaneous nerve
- Lateral flow test
- Lateral funiculus
- Lateral geniculate body
- Lateral geniculate nucleus
- Lateral group
- Lateral hypothalamus
- Lateral incisor
- Lateral inhibition
- Lateral internal sphincterotomy
- Lateral lemniscus
- Lateral line
- Lateral line system
- Lateral malleolus
- Lateral medullary syndrome
- Lateral meniscus
- Lateral pectoral nerve
- Lateral plantar artery
- Lateral plantar nerve
- Lateral plate mesoderm
- Lateral prefrontal cortex
- Lateral pterygoid muscle
- Lateral recess
- Lateral rectus muscle
- Lateral release
- Lateral retinaculum
- Lateral spinothalamic tract
- Lateral sulcus
- Lateral sural cutaneous nerve
- Lateral thalamic nuclei
- Lateral thinking
- Lateral thoracic artery
- Lateral thoracic vein
- Lateral umbilical fold
- Lateral ventricle
- Lateral vestibular nucleus
- Lateral vestibulospinal tract
- Laterality
- Laterodorsal tegmental nucleus
- Latex agglutination
- Latex agglutination test
- Latex allergy
- Lathyrism
- Latin hypercube
- Latin squares