9-letter words containing a, c, o, e
- macgregor — Joanna (Clare). born 1959, British concert pianist and broadcaster; recordings include the "crossover" album Play (2001)
- macrocode — a single code that contains a set of instructions.
- macrocyte — an abnormally large red blood cell.
- macrodome — a dome the faces of which are parallel to the greater lateral axis.
- macroetch — to etch deeply into the surface of (a metal).
- macrolide — Any of a class of antibiotics containing a lactone ring, of which the first and best known is erythromycin.
- macromere — one of the large blastomeres that form toward the vegetal pole in embryos undergoing unequal cleavage.
- macropore — Any pore sufficiently wide to allow water to flow unimpeded by capillary action.
- macrotape — (storage) /mak'roh-tayp/ An industry-standard reel of magnetic tape, as opposed to a microtape. See also round tape.
- manticore — a legendary monster with a man's head, horns, a lion's body, and the tail of a dragon or, sometimes, a scorpion.
- marruecos — Spanish name of Morocco.
- mascouche — a town in S Quebec, in E Canada.
- masoretic — of or relating to the Masorah or the Masoretes.
- mastocyte — Mast cell.
- megacolon — (uncountable) Abnormal dilatation of the colon, not caused by mechanical obstruction.
- megalopic — having large eyes
- megascope — A modification of the magic lantern, used especially for throwing a magnified image of an opaque object on a screen, solar or artificial light being used.
- megatonic — one million tons.
- melanotic — of or affected with melanosis.
- melomanic — characterized by a great enthusiasm for music
- meloxicam — an anti-inflammatory drug used to treat osteoarthritis
- mercapto- — (in chemical compounds) indicating the presence of an HS- group
- mescalero — a member of a group of Apache Indians who originally inhabited northern Mexico and the southwestern U.S. east of the Rio Grande, have intermarried with the Chiricahua and Lipan, and are presently situated in New Mexico.
- mesocarps — Plural form of mesocarp.
- mesocrany — the state of having a medium breadth of skull
- mesoscale — pertaining to meteorological phenomena, such as wind circulation and cloud patterns, that are about 1–100 km (0.6–60 miles) in horizontal extent.
- metabolic — of, relating to, or affected by metabolism.
- metacomet — one of the 12 apostles. Mark 3:18; John 1:43–48; 6:5–7.
- metalcore — (music) A genre of rock music related to punk and heavy metal.
- metalogic — the logical analysis of the fundamental concepts of logic.
- metarchon — a nontoxic substance, such as a chemical to mask pheromones, that reduces the persistence of a pest
- metascope — a device for converting infrared radiation into visible light.
- micaceous — consisting of, containing, or resembling mica.
- microbeam — (physics) A beam having a small cross section.
- microtape — (hardware, storage) /mi:'kroh-tayp/ Occasionally used to mean a DECtape, as opposed to a macrotape. Apparently the term "microtape" was actually the official term used within DEC for these tapes until someone coined the word "DECtape", which, of course, sounded sexier to the marketroids. Another version of the story holds that someone discovered a conflict with another company's "microtape" trademark.
- microwave — an electromagnetic wave of extremely high frequency, 1 GH 3 or more, and having wavelengths of from 1 mm to 30 cm.
- mislocate — to misplace.
- moctezuma — Montezuma II.
- mole crab — a burrowing crustacean of the genus Emerita, found on sandy ocean beaches of North America, having a distinctly curved carapace.
- molecular — of or relating to or caused by molecules: molecular structure.
- monacetin — acetin.
- monocable — an aerial ropeway having a single moving cable.
- monospace — Of a typeface, having the same width for each character.
- moonfaced — Alternative spelling of moon-faced.
- moonscape — the general appearance of the surface of the moon.
- moot case — a case dealing with an abstract question, or one seeking a judgement on a right before the right has been asserted
- moraceous — belonging to the Moraceae, the mulberry family of plants.
- morecambe — a port and resort in NW England, in NW Lancashire on Morecambe Bay (an inlet of the Irish Sea). Pop (with Heysham): 49 569 (2001)
- mosaicked — a picture or decoration made of small, usually colored pieces of inlaid stone, glass, etc.
- mosbacher — Emil, Jr ("Bus") 1922–1997, U.S. yacht racer and government official.