-mân, -eš, -i
A suffix of nouns indicating state, condition, or quality, or the result or product of an action.
From Fr., from L. -mentum.
A combining form meaning "measure," used in the names of instruments measuring quantity, extent, degree.
From Fr. -mètre; → meter.
Suffix -sanj, present stem of sanjidan "to measure; to compare," from Mid.Pers. sanjidan "to weigh," from present tense stem sanj-, Av. θanj- "to draw, pull;" Proto-Iranian *θanj-. Other terms from this base in Pers.: lanjidan "to pull up," hanjidan, âhanjidan "to draw out," farhang "education, culture."
A suffix with the meaning "the process of measuring."
→ -meter + -y a suffix used in the formation of action nouns.
-sanji, from sanj, → -meter, + -i a suffix of verbal nouns.
Fr.: naine M
A star whose spectrum is dominated by the absorption bands of → titanium oxide (TiO) and → vanadium oxide (VO) and has many neutral metal lines. The → effective temperature of M dwarfs ranges from about 3850 to 2600 K. They are low mass stars with masses ranging from 0.6 times that of the Sun at spectral type M0 to less than 0.1 → solar masses. M dwarfs are very abundant, they account for about 70-80% of stars in the → Galactic disk. The nearest star to the Sun, → Proxima Centauri, is an M dwarf.
setâre-ye M (#)
Fr.: étoile de type M
A cool, red star of spectral type M with a surface temperatures of less than 3600 K. The spectra of M stars are dominated by molecular bands, especially those of TiO. Naked-eye examples are Betelgeuse and Antares.
M, letter of alphabet, → star.
sayârak-e gune-ye M
Fr.: astéroïde de type M
An → open cluster in the constellation → Serpens associated with the → Eagle Nebula. It is usually mistakenly stated as being that nebula. Also called NGC 6611. First discovered by Philippe Loys de Chéseaux in 1745-6.
Object bearing the number 16 in the → Messier catalog.
Fr.: angle de Mach
Half of the vertex angle of the → Mach cone generated by a body in → supersonic flight. It is given by sin μ = (a/v), where a is the speed of the sound waves and v the velocity of the object. In terms of Mach number: μ = asin (1/M). The Mach angle diminishes with the object velocity. For M = 1 it is 90°, for M = 2, it is 30°, and for M = 5, its is 11.5°.
Fr.: cône de Mach
gerde-ye Mach, disk-e ~
Fr.: disque de Mach
Same as → shock diamond.
So named because Ernst Mach (1838-1916) was the first to record its existence.
adad-e Mach (#)
Fr.: nombre de Mach
The ratio of the speed of a moving object to the → sound speed in the medium through which the object is traveling.
Named after the Austrian physicist Ernst Mach (1838-1916); → number.
Fr.: onde de Mach
The envelope of wave fronts created by a → supersonic source.
Fr.: principe de Mach
1) An apparatus consisting of interrelated parts with separate functions, used in the
performance of some kind of work.
From M.Fr. machine "device, contrivance," from L. machina "machine, fabric, device, trick," from Doric Gk. makhana, Attic Gk. mekhane "device, means," related to mekhos "means, expedient," from PIE *maghana- "that which enables," from base *magh- "to be able, have power" (cf. O.C.S. mogo "be able," O.E. mæg "I can").
Mâšin, loanword from Fr.
A collective term for objects that reside in the → halo of a galaxy (in particular → brown dwarfs) and which do not emit enough radiation to be detected from Earth. MACHOs can be spotted using the technique of → microlensing.
Acronym from Massive Astrophysical Compact Halo Objects.
Fr.: série de Maclaurin
A → Taylor series that is expanded about the reference point zero.
Named after Colin Maclaurin (1698-1746), a Scottish mathematician.
A combining form meaning "large, long, great, excessive," used in the formation of compound words; opposite of → micro-.
From Gk. makros "long, large," from PIE base *mak-/*mek- "long, thin" (cf. L. macer "lean, thin;" O.N. magr, O.E. mæger "lean, thin").
Dorošt "large; rough, fierce," from Mid.Pers. društ "harsh, coarse;" O.Pers. darš- "to dare," daršam (adv.) "mightily;" Av. darš- "to dare," darši-, daršita- "bold, strong;" cf. Skt. dhars- "to be bold, courageous, to attack," dhrsita- "bold, daring;" Gk. thrasys "bold;" O.E. durran; E. dare.
The great world or Universe; the Universe considered as a whole (opposed to
A stellar → explosion with energies between those of a → nova and a → supernova and observationally distinguished by being brighter than a typical nova (MV ~ -8 mag) but fainter than a typical supernova (MV ~ -19 mag) (Kulkarni 2005; arXiv:astro-ph/0510256).