formulae
n . 公式,规则,客套话
公式,规则,客套话
Formula \
For "
mu *
la \,
n .;
pl .
E . {
Formulas },
L . {
Formul [
ae ]}.
[
L .,
dim .
of forma form ,
model .
See {
Form },
n .]
1 .
A prescribed or set form ;
an established rule ;
a fixed or conventional method in which anything is to be done ,
arranged ,
or said .
[
1913 Webster ]
2 . (
Eccl .)
A written confession of faith ;
a formal statement of foctrines .
[
1913 Webster ]
3 . (
Math .)
A rule or principle expressed in algebraic language ;
as ,
the binominal formula .
[
1913 Webster ]
4 . (
Med .)
A prescription or recipe for the preparation of a medicinal compound .
[
1913 Webster ]
5 . (
Chem .)
A symbolic expression (
by means of letters ,
figures ,
etc .)
of the constituents or constitution of a compound .
[
1913 Webster ]
Note :
Chemical formul [
ae ]
consist of the abbreviations of the names of the elements ,
with a small figure at the lower right hand ,
to denote the number of atoms of each element contained .
[
1913 Webster ]
{
Empirical formula } (
Chem .),
an expression which gives the simple proportion of the constituents ;
as ,
the empirical formula of acetic acid is {
C2H4O2 }.
{
Graphic formula }, {
Rational formula } (
Chem .),
an expression of the constitution ,
and in a limited sense of the structure ,
of a compound ,
by the grouping of its atoms or radicals ;
as ,
a rational formula of acetic acid is {
CH3 .(
C :
O ).
OH }; --
called also {
structural formula },
{
constitutional formula },
etc .
See also the formula of {
Benzene nucleus },
under {
Benzene }.
{
Molecular formula } (
Chem .),
a formula indicating the supposed molecular constitution of a compound .
[
1913 Webster ]
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