Found 1 items, similar to RNH2.
English → English
, a. [Cf. F. secondaire, L. secundaire.
1. Succeeding next in order to the first; of second place,
origin, rank, etc.; not primary; subordinate; not of the
first order or rate.
Wheresoever there is moral right on the one hand, no
secondary right can discharge it. --L'Estrange.
Two are the radical differences; the secondary
differences are as four. --Bacon.
2. Acting by deputation or delegated authority; as, the work
of secondary hands.
3. (Chem.) Possessing some quality, or having been subject to
some operation (as substitution), in the second degree;
as, a secondary salt, a secondary amine, etc. Cf.
Note: A primary amine has the general formula R.NH2
secondary amine has the general formula R.NH.R'
where R and R' are alkyl or aryl groups. A primary
alcohol has the general formula R.CH2.OH
; a secondary
alcohol has the general formula R.CHOH.R'
amines and alcohols have the general formulas
4. (Min.) Subsequent in origin; -- said of minerals produced
by alteration or deposition subsequent to the formation of
the original rock mass; also of characters of minerals (as
secondary cleavage, etc.) developed by pressure or other
5. (Zo["o]l.) Pertaining to the second joint of the wing of a
(a) Dependent or consequent upon another disease; as,
Bright's disease is often secondary to scarlet fever.
(b) Occurring in the second stage of a disease; as, the
secondary symptoms of syphilis.
. See the Note under Accent
, n., 1.
. (Geol.) The Mesozoic age, or age before the
Tertiary. See Mesozoic
, and Note under Age
, n., 8.
(Chem.), any one of a series of alcohols
which contain the radical CH.OH
united with two
hydrocarbon radicals. On oxidation the secondary alcohols
(Surg.), an amputation for injury,
performed after the constitutional effects of the injury
(Opt.), any line which passes through the
optical center of a lens but not through the centers of
curvature, or, in the case of a mirror, which passes
through the center of curvature but not through the center
of the mirror.
. (Elec.) See under Battery
, n., 4.
(Geom. & Astron.), a great circle that
passes through the poles of another great circle and is
therefore perpendicular to its plane.
, Secondary coil
(Elec.), a circuit or
coil in which a current is produced by the induction of a
current in a neighboring circuit or coil called the
primary circuit or coil.
, a color formed by mixing any two primary
colors in equal proportions.
(Zo["o]l.), the longer coverts which
overlie the basal part of the secondary quills of a bird.
See Illust. under Bird
(Min.), a crystal derived from one of the
(Elec.), a momentary current induced in a
closed circuit by a current of electricity passing through
the same or a contiguous circuit at the beginning and also
at the end of the passage of the primary current.
, that which is admitted upon failure to
obtain the primary or best evidence.
(Med.), a fever coming on in a disease
after the subsidence of the fever with which the disease
began, as the fever which attends the outbreak of the
eruption in smallpox.
(Med.), hemorrhage occuring from a
wounded blood vessel at some considerable time after the
original bleeding has ceased.
. (Astron.) See the Note under Planet
, those qualities of bodies which are
not inseparable from them as such, but are dependent for
their development and intensity on the organism of the
percipient, such as color, taste, odor, etc.
or Secondary remiges
quill feathers arising from the forearm of a bird and
forming a row continuous with the primaries; -- called
. See Illust. of Bird
or Secondary strata
(Geol.), those lying
between the Primary, or Paleozoic, and Tertiary (see
, under Primary
); -- later restricted to
strata of the Mesozoic age, and at present but little
(Med.), the second stage of syphilis,
including the period from the first development of
constitutional symptoms to the time when the bones and the
internal organs become involved.
, any subdued tint, as gray.
(Surg.), the union of wounds after
suppuration; union by the second intention.
Syn: Second; second-rate; subordinate; inferior.