- LDL receptor
- LE cell
- LEF1
- LETM1
- LFA-1
- LFA-3
- LGBT
- LGP2
- LGR5
- LH
- LHCGR
- LHON
- LHX3
- LIF
- LIG4
- LIG4 syndrome
- LILRB1
- LILRB4
- LIM domain
- LIMS
- LINE
- LMNA
- LNCaP
- LOAEL
- LOINC
- LONP1
- LOX1
- LPB
- LPC
- LPCA
- LRBA deficiency
- LRP1
- LRRC8A
- LRRK2
- LSD
- LSm
- LTC4 synthase
- LTP
- LTP induction
- LTR retrotransposons
- LUCA
- LY294002
- LYL1
- LYN
- LYVE1
- LZTFL1
- Labdane
- Label-free quantification
- Labetalol
- Labia majora
- Labia minora
- Labial
- Labial fusion
- Labial glands
- Labiaplasty
- Labile cells
- Labile hypertension
- Lability
- Labioscrotal folds
- Labioscrotal swelling
- Labisia pumila
- Labium
- Labor induction
- Laboratory automation
- Laboratory developed tests
- Laboratory experiment
- Laboratory glassware
- Laboratory safety
- Laboratory-acquired infection
- Labored breathing
- Labral
- Labral reconstruction
- Labyrinthectomy
- Labyrinthine artery
- Labyrinthine fistula
- Labyrinthitis
- Lac
- Laccase
- Lacerations
- Lachman test
- Lachnospiraceae
- Lacosamide
- Lacquer
- Lacrimal apparatus
- Lacrimal artery
- Lacrimal bone
- Lacrimal canaliculi
- Lacrimal fluid
- Lacrimal fossa
- Lacrimal gland
- Lacrimal groove
- Lacrimal lake
- Lacrimal nerve
- Lacrimal papilla
- Lacrimal punctum
- Lacrimal sac
- Lacrimal system
- Lacrimation
- Lactacystin
- Lactalbumin
- Lactam
- Lactase
- Lactase deficiency
- Lactase persistence
- Lactate dehydrogenase
- Lactated ringers solution
- Lactation
- Lactation consultants
- Lactation failure
- Lactation suppression
- Lactational amenorrhea
- Lacteals
- Lactic acid
- Lactic acid bacteria
- Lactic acid fermentation
- Lactic acidosis
- Lactide
- Lactiferous ducts
- Lactitol
- Lactobacillales
- Lactobacilli
- Lactobacillus
- Lactobacillus acidophilus
- Lactobacillus casei
- Lactobacillus crispatus
- Lactobacillus helveticus
- Lactobacillus iners
- Lactobacillus jensenii
- Lactobacillus johnsonii
- Lactobacillus paracasei
- Lactobacillus plantarum
- Lactobacillus reuteri
- Lactobacillus rhamnosus
- Lactobionic acid
- Lactococcus
- Lactococcus garvieae
- Lactococcus lactis
- Lactoferricin
- Lactoferrin
- Lactol
- Lactones
- Lactoperoxidase
- Lactophenol cotton blue
- Lactose intolerance
- Lactose permease
- Lactose synthase
- Lactosylceramide
- Lactotroph
- Lactuca virosa
- Lactucin