From The Collaborative International Dictionary of English v.0.48 [gcide]:
Fractional \Frac"tion*al\, a.
1. Of or pertaining to fractions or a fraction; constituting
a fraction; as, fractional numbers.
[1913 Webster]
2. Relatively small; inconsiderable; insignificant; as, a
fractional part of the population.
[1913 Webster]
{Fractional crystallization} (Chem.), a process of gradual
and approximate purification and separation, by means of
repeated solution and crystallization therefrom.
{Fractional currency}, small coin, or paper notes, in
circulation, of less value than the monetary unit.
{Fractional distillation} (Chem.), a process of distillation
so conducted that a mixture of liquids, differing
considerably from each other in their boiling points, can
be separated into its constituents.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Distillation \Dis`til*la"tion\ (d[i^]s`t[i^]l*l[=a]"sh[u^]n), n.
[F. distillation, L. destillatio.]
1. The act of falling in drops, or the act of pouring out in
drops.
[1913 Webster]
2. That which falls in drops. [R.] --Johnson
[1913 Webster]
3. (Chem.) The separation of the volatile parts of a
substance from the more fixed; specifically, the operation
of driving off gas or vapor from volatile liquids or
solids, by heat in a retort or still, and the condensation
of the products as far as possible by a cool receiver,
alembic, or condenser; rectification; vaporization;
condensation; as, the distillation of illuminating gas and
coal, of alcohol from sour mash, or of boric acid in
steam.
[1913 Webster]
Note: The evaporation of water, its condensation into clouds,
and its precipitation as rain, dew, frost, snow, or
hail, is an illustration of natural distillation.
[1913 Webster]
4. The substance extracted by distilling. --Shak.
[1913 Webster]
{Destructive distillation} (Chem.), the distillation,
especially of complex solid substances, so that the
ultimate constituents are separated or evolved in new
compounds, -- usually requiring a high degree of heat; as,
the destructive distillation of soft coal or of wood.
{Dry distillation}, the distillation of substances by
themselves, or without the addition of water or of other
volatile solvent; as, the dry distillation of citric acid.
{Fractional distillation}. (Chem.) See under {Fractional}.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
fractional distillation
n 1: fractionation of a liquid by distillation
|
