鞭毛虫类：包括除去领鞭毛目(Choanoflagellida)和动体目(Kinetoplastida)以外的所有的动鞭毛虫(zooflagellates)类的原虫，多数为昆虫肠道的共栖生物- leukovirus
- leuprolide
- Levaditi's stain
- levallorphan tartrate
- levamfetamine
- levamisole hydrochloride
- levan
- levansucrase
- levarterenol
- levator
- levatores
- level
- levicellular
- levidulinose
- levigation
- Levin's tube
- levitation
- lev(o)-
- levocardia
- levocardiogram
- levoclination
- levocycloduction
- levodopa
- Levo-Dromoran
- levoduction