Medical Terminology Letter M
| TERM | MEANING |
| -malacia | softening |
| mamm/o | breast |
| -mania | madness, obsessive, preoccupation |
| -masesis | mastication, chewing |
| mast/o | breast |
| maxill/o | maxilla |
| mediastin/o | mediastinum |
| medic/o | heal, healing |
| medi/o | middle |
| medull/o | medulla, marrow |
| mega- | million (10⁶) |
| -megaly | enlargement |
| mega-, megalo- | large |
| melan/o | black |
| meli-, melit- | honey, sugar |
| mel/o | limbs, limb |
| mening/o | meninges, membranes |
| men/o | menses, menstruation |
| ment/o | mind |
| mer/o | part |
| meso- | middle |
| meta- | after, beyond, change |
| metall/o | metal |
| -meter | instrument for measuring |
| method/o | procedure, technique |
| metr/o | uterus |
| -metry | process of measuring |
| micro- | one millionth (10⁻⁶), small |
| milli- | one thousandth (10⁻³) |
| -mimesis | imitation, simulation |
| mi/o | less, smaller |
| mis/o | hatred of, aversion |
| -mnesia | memory |
| mogi- | difficult |
| mono- | one |
| morph/o | shape, form |
| mort/o | death |
| -motor | movement, motion |
| muc/o | mucus |
| multi- | many, much |
| muscul/o | muscle |
| mutilat/o | to maim, disfigure |
| myc/o | fungus |
| myel/o | bone marrow, spinal cord |
| my/o, myos/o | muscle |
| myring/o | eardrum |
| myx/o | mucus |
