Meissner's plexus - milk thistle
- Meissner's plexus
- Melampsalta puer
- Melampsalta torrida
- Melanargia
- Melanargia galathea
- Melanaspis inopinata
- Melanaspis obscura
- Melanaspis smilacris
- Melanaspis tenebricosa
- melandryid beetle
- melandryid beetles
- Melandryidae
- melangeaphytia
- melanin
- melanin-dispersing hormone
- melanism
- melanoblast
- melanocarpous
- melanocyte
- melanocyte-stimulating activity
- melanocyte-stimulating hormone
- melanogenesis
- Melanogryllus infernalis
- Melanophila acuminata
- Melanophila califomica
- Melanophila consputa
- Melanophila cyanea
- Melanophila decastigma
- Melanophila drummondi
- Melanophila fulvoguttata
- Melanophila picta
- melanophore
- Melanoplus atlanis
- Melanoplus bivittatus
- Melanoplus devastator
- Melanoplus differentialis
- Melanoplus femur-rubrum
- Melanoplus friaidus
- Melanoplus mexicanus
- Melanoplus packardii
