- mean distance
 - mud dauber
 - masefield
 - maxfield parrish
 - mud midget
 - meadow fescue
 - melanocarcinoma
 - modula
 - machine sensible information
 - marche
 - metal wood
 - morphallaxis
 - mitosis
 - macroevolution
 - microevolution
 - metastasis
 - microcytic_ hypochromic anaemia
 - monosomy
 - microcytic anemia
 - malignant anemia
 - mucoid
 - mucin
 - myogenic theory
 - multifrequency pushbutton set
 - matrix test
 - marcel marceau
 - montserrat
 - ms_dos
 - mohave desert
 - marie anne charlotte corday d'armont
 - major vestibular gland
 - mary ann evans
 - melanuria
 - mayo_gibbon screnn oxygenator
 - mesocuneiform
 - motilin
 - melanochrous
 - melanogen
 - master culture
 - monohydrate
 - multimedia mail
 - multimodal curve
 - multilocular cyst
 - myxoedema
 - monaco
 - metalepsis
 - matrilocal
 - morphological adaptation
 - meridional aberration
 - mont blanc