Definitions for: M


[n] concentration measured by the number of moles of solute per liter of solvent
[n] the 13th letter of the Roman alphabet
[n] the basic unit of length adopted under the System International d'Unites (approximately 1.094 yards)
[n] the cardinal number that is the product of 10 and 100
[adj] denoting a quantity consisting of 1,000 items or units



Webster (1913) Definition: M ([e^]m).
1. 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. See Guide to
Pronunciation, [sect][sect] 178-180, 242.

Note: The letter M came into English from the Greek, through
the Latin, the form of the Greek letter being further
derived from the Ph[oe]nician, and ultimately, it is
believed, from the Egyptian. Etymologically M is
related to n, in lime, linden; emmet, ant; also to b. M
is readily followed by b and p. the position of the
lips in the formation of both letters being the same.
The relation of b and m is the same as that of d and t
to n. and that of g and k to ng.

2. As a numeral, M stands for one thousand, both in English
and Latin.


M, n.
1. (Print.) 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. [Written also em.]

2. (law) A brand or stigma, having the shape of an M,
formerly impressed on one convicted of manslaughter and
admitted to the benefit of clergy.

M roof (Arch.), a kind of roof formed by the junction of
two common roofs with a valley between them, so that the
section resembles the letter M.

Synonyms: 1000, 1000, a thousand, cardinal, chiliad, G, grand, k, K, meter, metre, molar concentration, molarity, one thousand, one thousand, thou, thousand, thousand, yard

See Also: alphabetic character, concentration, dam, decameter, decametre, decimeter, decimetre, dekameter, dekametre, dkm, dm, large integer, letter, letter of the alphabet, metric linear unit, Roman alphabet

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