M1. (n.) M, the thirteenth letter of the English alphabet, is a vocal consonant, and from the manner of its formation, is called the labio-nasal consonant.
2. (n.) As a numeral, M stands for one thousand, both in English and Latin.
3. (n.) A quadrat, the face or top of which is a perfect square; also, the size of such a square in any given size of type, used as the unit of measurement for that type: 500 m's of pica would be a piece of matter whose length and breadth in pica m's multiplied together produce that number.
4. (n.) A brand or stigma, having the shape of an M, formerly impressed on one convicted of manslaughter and admitted to the benefit of clergy.
Thesaurus Entries
Amytal, Amytal pill, Argyrol, Chile saltpeter, Demerol, Dial, Dolophine, H, John Barleycorn, Luminal, Luminal pill, M, Mercurochrome, Merthiolate, Mickey Finn, Nembutal, Nembutal pill, Salol, Seconal, Seconal pill, Sulfonal, Trional, Tuinal, Tuinal pill, absolute alcohol, acetate, acetone, alcoholic beverage, alcoholic drink, aldehyde, amine, ammonia, amobarbital sodium, amyl alcohol, analgesic, anhydride, anodyne, antifreeze, aqua regia, aqua vitae, ardent spirits, arsenate, arsenite, barb, barbital, barbiturate, barbiturate pill, barbituric acid, basic anhydride, belladonna, benzine, benzoate, beverage, bicarbonate, bicarbonate of soda, bichloride of mercury, bisulfate, black stuff, blue, blue angel, blue devil, blue heaven, blue velvet, booze, borate, borax, boric acid, brew, briquette, bromide, burnable, butane, calcium carbonate, calcium hydroxide, calmative, calomel, camphor, carbide, carbohydrate, carbolic acid, carbon, carbon dioxide, carbon monoxide, carbon tet, carbon tetrachloride, carbonate, charcoal, chloral hydrate, chloramine, chlorate, chlorite, chloroform, chromate, citrate, coal, codeine, codeine cough syrup, coke, combustible, copperas, cresol, cyanide, dehydrated alcohol, depressant, depressor, dichromate, dioxide, disulfide, dolly, dope, downer, drink, ester, ethane, ethanol, ether, ethyl, ethyl alcohol, ethylene glycol, fireball, firewater, firing, flammable, flammable material, fluoride, formaldehyde, fuel, fuel additive, fuel dope, fulminate, gas, gas carbon, gasoline, gentian violet, goofball, gramicidin, grog, halide, halogen, hard liquor, hard stuff, heptane, heroin, hexachloraphene, hexane, hooch, hop, horse, hydrate, hydride, hydrocarbon, hydrogen peroxide, hydroxide, hyoscyamine, hypnotic, hypochlorite, inebriant, inflammable, inflammable material, intoxicant, intoxicating liquor, iodide, iodine, isooctane, isopropyl alcohol, jet fuel, juice, junk, kerosene, ketone, knockout drops, lactate, laudanum, liquor, little brown jug, lotus, meperidine, methadone, methane, methanol, methyl, methyl alcohol, monoxide, moonshine, morphia, morphine, narcotic, natural gas, niter, nitrate, nitride, nitrite, octane, oil, opiate, opium, oxalate, oxide, pacifier, pain killer, paraffin, paraldehyde, paregoric, peat, pen yan, pentane, pentobarbital, permanganate, peroxide, petrochemical, phenobarbital, phenobarbital sodium, phenol, phenyl salicylate, phosphate, phosphide, potable, potash, potassium nitrate, potation, propane, propellant, punch bowl, purple heart, quietener, rainbow, red, reserpine, resorcinol, rocket fuel, rum, sal ammoniac, salt, saltpeter, sauce, scag, schnapps, scopolamine, secobarbital sodium, sedative, shit, silicate, silver vitellin, sleep-inducer, sleeper, sleeping draught, sleeping pill, smack, social lubricant, sodium bicarbonate, sodium bromide, sodium chloride, sodium hypochlorite, sodium thiopental