moment ۱، ۲) گشتاور؛ ۳) دم 1, 2) gaštâvar (#); 3) dam (#) Fr.: moment Physics: An expression involving the → product
a → quantity, such as → force
or → mass, and its perpendicular → distance
from a reference point, such as → moment of force
(or → torque), → moment of inertia,
→ moment of momentum.
Statistics:
For a → random variable X, its nth moment about
the mean is the expected value
of the nth power of X, where n is a positive integer.
The nth moment of the deviation of X from the mean is called
the nth central moment. The first moment is the → mean,
the second central moment is the → variance.
A short indefinite period of time.
Etymology (EN): From O.Fr. moment, from L. momentum “movement, moving power,”
also “instant, importance,” contraction of *movimentum,
from movere, → move. Etymology (PE): Gaštâvar literally “that which makes turn, turning agent,” from
gašt “turning,” past stem of
gaštan, gardidan “to turn,
to change” (Mid.Pers. vartitan; Av. varət- “to turn, revolve;”
Skt. vrt- “to turn, roll,” vartate “it turns round, rolls;”
L. vertere “to turn;” O.H.G. werden “to become;”
PIE base *wer- “to turn, bend”) + âvar
agent noun of
âvardan “to bring; to cause, produce”
(Mid.Pers. âwurtan, âvaritan; Av. ābar- “to bring; to possess,”
from prefix ā- + Av./O.Pers. bar- “to bear, carry,”
bareθre “to bear (infinitive),” bareθri
“a female that bears (children), a mother;” Mod.Pers. bordan “to carry;”
Skt. bharati “he carries;” Gk. pherein; L. fero “to carry”).
Dam,
“breath; moment; time,” from Mod./Mid.Pers. damidan “to breathe, blow;”
Av. dāδmainya- “blowing up,”
Skt. dahm- “to blow,” dhámati “blows,”
Gk. themeros “austere, dark-looking,”
Lith. dumti “to blow,” PIE dhem-/dhemə-
“to smoke, to blow”. |
