Pârsang "a make-weight," from pâr-, a variant of pâd-,
→ counter-, + sang a variant of sanj, sanjidan
"to measure; compare, put in balance," → object; alternatively,
pârsang "a piece of stone,"
from pâr, short for pâré "piece, part," + sang,
→ stone, meaning "weight."

M.E. eighte, from O.E. eahta, æhta, related to
O.Norse atta, Swed. åtta, Du. acht, O.H.G.
Ahto, Ger. acht; Pars. hašt, as below,
from PIE *okto(u) "eight."

Hašt, from Mid.Pers. hašt; Av. ašta;
cognate with Skt. asta; Gk. okto; L. octo
(from which It. otto, Sp. ocho, Fr. huit).

height

بلندی، بلندا، فرازا

bolandi (#), bolandâ (#), farâzâ (#)

Fr.: hauteur

Distance upward from a given level to a fixed point.

M.E., from O.E. hiehthu; → high + -th
a suffix forming nouns of action (e.g., birth) or abstract nouns denoting quality
or condition (depth; length; warmth).

Bolandi, bolandâ "height," noun forms from boland
"high," variants bâlâ
"up, above, high, elevated, height," borz "height, magnitude"
(it occurs also in the name of the mountain chain Alborz),
Lori dialect berg "hill, mountain;"
Mid.Pers. buland "high;" O.Pers. baršan- "height;"
Av. barəz- "high, mount," barezan- "height;" cf.
Skt. bhrant- "high;" L. fortis "strong" (Fr. & E. force);
O.E. burg, burh "castle, fortified place," from P.Gmc.
*burgs "fortress;" Ger. Burg "castle," Goth. baurgs "city,"
E. burg, borough, Fr. bourgeois, bourgeoisie, faubourg);
PIE base *bhergh- "high." Farâzâ, noun of farâz "above, up, upon, on the top, aloft," from
Mid.Pers. farâz, farâc "forward, prominent, distinguished;"
Av. frānk- (adj.) "turned toward the front," fraca (adv.)
"forward, forth," fraš (adv.) "forward, forth; before;" Proto-Iranian
*frānk-.

mean molecular weight

وزن ِ مولکولی ِ میانگین

vazn-e molekuli-ye miyângin (#)

Fr.: poids moléculaire moyen

The total atomic or molecular weight divided by the total number of
particles. For instance, the mean molecular weight of a plasma of pure
ionized ^{4}He would be 4 (the atomic mass number) divided by 3, the
total number of particles (1 nucleus plus 2 electrons), i.e.
4/3.

A basic ingredient of the → mixing length theory that scales
with the → mixing length. It is defined by the relation:
H_{P} = -dr/dln P = -Pdr/dP ,
where r is the height and P the pressure. See also
→ scale height.

The height within which some parameter, such as pressure or density, decreases by a factor
of e. For example, an atmospheric scale height of 100 km means that the value at
100 km is 1/e the value at the surface.

1) Statistics: A number assigned to each value or range of values of a
given quantity, giving the number of times this value or range of
values is found to be observed.
2) Statistical mechanics: A multiplicative factor in
the expression for the probability of finding a system in a given
quantum state. Usually the number of degenerate substates
contained in the state.

The phenomenon experienced by a body when there is no force of reaction on it.
This happens when the body is in → free fall in a
→ gravitational field or when the net force on it is zero.

From → weight + -less suffix meaning "without"
+ -ness a suffix of quality or state.