| Mathematically validated | 24 |
| Mathematician Descartes | 23 |
| Mathematician Gödel | 22 |
| Mathematician John von ___ | 26 |
| Mathematician Khayyám | 24 |
| Mathematician Leonhard | 22 |
| Mathematician Lovelace | 22 |
| Mathematician Mandelbrot | 24 |
| Mathematician Napier, for one | 29 |
| Mathematician Poincaré | 25 |
| Mathematician Post or Artin | 27 |
| Mathematician Turing et al. | 27 |
| Mathematician ___ de Fermat | 27 |
| Mathematician ___ Henrik Abel | 29 |
| Mathematician's abbr. | 25 |
| Mathematician's degree? | 27 |
| Mathematician's initials | 28 |
| Mathematician's letters | 27 |
| Mathematician's number | 26 |
| Mathematician's ordinal | 27 |
| Mathematician's pride | 25 |
| Mathematician's query? | 26 |
| Mathematician's sign-off | 28 |
| Mathematician's song? | 25 |
| Mathematics and biology | 23 |
| Mathematics writer Martin | 25 |
| Mather or Maxwell: Abbr. | 24 |
| Matheson or George, e.g. | 24 |
| Mathew Brady creations | 22 |
| Mathlete, stereotypically | 25 |
| Matilda, in an Aussie tune | 26 |
| Matinee showing time, maybe | 27 |
| Matinee ___ (old film star) | 27 |
| Mating call in a chat room | 26 |
| Matisse worked with them | 24 |
| Matisse, Dufy and Derain | 24 |
| Matlock's workplace | 23 |
| Matriarch of all matriarchs | 27 |
| Matriarch of the Brady Bunch | 28 |
| Matriarch of the Kennedy clan | 29 |
| Matriarch of the Titans | 23 |
| Matriarchal buck-passing | 24 |
| Matricidal figure of myth | 25 |
| Matricide of Greek myth | 23 |
| Matriculation of hot dogs? | 26 |
| Matrimonial cake ingredient | 27 |
| Matrimonial cake staple | 23 |
| Matrimonial declaration | 23 |
| Matrimonial relationships | 25 |
| Matrimonial tie that binds? | 27 |
| Matrimony, bar mitzvah, etc. | 28 |
| Matrimony, metaphorically | 25 |
| Matrix of computer networks | 27 |
| Matron, to a maitre d' | 26 |
| Matt Damon collaborator | 23 |
| Matt Damon film of '06 | 26 |
| Matt Damon's private | 24 |
| Matt Dillon portrayer James | 27 |
| Matt Dillon's helpers | 25 |
| Matt Dillon's ___ City | 26 |
| Matt Drudge's trademark | 27 |
| Matt Groening's creation | 28 |
| Matt of 'Today' | 23 |
| Matt of "Friends" | 27 |
| Matt of "Joey" | 24 |
| Matt of "Today" | 25 |
| Matt of morning television | 26 |
| Matt of Namath's Jets | 25 |
| Matt Ward song about escapee? | 29 |
| Matted cotton for stuffing | 26 |
| Mattel bestseller since 1968 | 28 |
| Mattel doll for Satan? | 22 |
| Mattel subsidiary since 1997 | 28 |
| Matter for the gray matter | 26 |
| Matter for the Met and Mets | 27 |
| Matter found in briefs? | 23 |
| Matter of current concern | 25 |
| Matter of fact introduction? | 28 |
| Matter of great importance | 26 |
| Matter of growing interest | 26 |
| Matter of interpretation | 24 |
| Matter of lease concern? | 24 |
| Matter of life and death | 24 |
| Matter of little importance | 27 |
| Matter of little relevance | 26 |
| Matter of miner concern | 23 |
| Matter of no importance | 23 |
| Matter of self-interest? | 24 |
| Matter of union bargaining | 26 |
| Matter of W.W. II secrecy | 25 |
| Matter or freeze start | 22 |
| Matter to be discussed | 22 |
| Matter to go to court over | 26 |
| Matter, to Marc Antony | 22 |
| Matter-of-fact language | 23 |
| Matter-of-fact writing | 22 |
| Matter-of-fact, as text | 23 |
| Matterhorn et al.: Abbr. | 24 |
| Matterhorn or Jungfrau | 22 |
| Matterhorn or Monte Leone | 25 |