- Lac Alaotra
- lacrimal bone
- lacrimal foramen
- lagomorphs
- lagoon
- lake
- lalomena
- lamba
- lambdoid suture
- lamella
- lanceolate
- Landmarks
- larva
- laterad
- lateral
- Laurasia
- lavabary
- lavaka
- Lectotype
- leech
- leukocyte
- Leydig cells
- Lieberkühn's crypts
- life history
- life-cycle
- ligament
- lingual
- Linnaean classification
- Lithospheric plate
- LMS
- lobe
- local
- locust
- Lokobe
- longitudinal
- Lower Risk
- lumbar
- lunate
- Lundberg rooting
- lymphocyte