| Machinima | Machinima |
| Machismo | Phallocentrism |
| MACHO | Massive compact halo object |
| Machu Picchu | Machu Picchu |
| Machzor | Mahzor |
| macica | womb |
| Maciej | Matthew |
| Maciej Apostoł | Saint Matthias |
| Maciej Korwin | Matthias Corvinus of Hungary |
| Maciej Sarbiewski | Maciej Kazimierz Sarbiewski |
| Maciej Stryjkowski | Maciej Stryjkowski |
| Maciej Wołonczewski | Motiejus Valančius |
| Maciej Żurawski | Maciej Żurawski |
| macierz | fatherland |
| Macierz BCG | Growth-share matrix |
| Macierz dodatnio określona | Positive-definite matrix |
| Macierz dominująca | Diagonally dominant matrix |
| Macierz dołączona | Adjugate matrix |
| Macierz dyskowa | Disk array |
| Macierz Frobeniusa | Frobenius matrix |
| Macierz Grama | Gramian matrix |
| Macierz gęstości | Density matrix |
| Macierz Hadamarda | Hadamard matrix |
| Macierz hermitowska | Hermitian matrix |
| Macierz Hilberta | Hilbert matrix |
| Macierz jednostkowa | Identity matrix |
| Macierz jądrowa | Nuclear matrix |
| Macierz klatkowa | Block matrix |
| Macierz kowariancji | Covariance matrix |
| Macierz nilpotentna | Nilpotent matrix |
| Macierz normalna | Normal matrix |
| Macierz ortogonalna | Orthogonal matrix |
| Macierz S | S matrix |
| Macierz schodkowa | Row echelon form |
| macierz stochastyczna | stochastic matrix |
| Macierz Toeplitza | Toeplitz matrix |
| Macierz unitarna | Unitary matrix |
| macierzanka | thyme |
| Macierzanka piaskowa | Thymus praecox |
| Macierzanka pospolita | Thyme |
| Macierzanka tymianek | Thyme |
| Macierze Pauliego | Pauli matrices |
| macierzyński | maternity |
| Macina | Niger Inland Delta |
| Macintosh | Macintosh |
| Macintosh Plus | Macintosh Plus |
| macka | tentacle |
| Mackenzie | Mackenzie River |
| Mackie Majcher | Mack the Knife |
| mackowaty | tentacular |
| Macky Sall | Macky Sall |
| MACLisp | Maclisp |
| Macobraj | Matzah brei |
| macocha | stepmother |
| Macquarie | Macquarie Island |
| Macrianus II | Macrianus Minor |
| Macropedius | Macropedius |
| Macrovipera | Macrovipera |
| Mactan | Mactan |
