radical /rad·i·cal/ (rad´ĭ-k'l)
radical
radical [rad´ĭ-kal]
radical,
1. directed to the root or cause; designed to eliminate all possible extensions of a morbid process.
2. a group of atoms that enters and goes out of chemical combination without change.
free radical a radical that carries an unpaired electron; such radicals are extremely reactive, with a very short half-life.
rad·i·cal (r d  -k l)n. Abbr. R 1. A group of elements or atoms usually passing intact from one compound to another but generally incapable of prolonged existence in a free state. 2. A free radical. adj. 1. Of or being medical treatment by extreme, drastic, or innovative measures. 2. Designed to act on or eliminate the root or cause of a pathological process. |
radical
[rad′ikəl]
Etymology: L, radix, root
1 n, an atom or group of atoms that contains an unpaired electron. A radical does not exist freely in nature except for O2, NO, and NO2.
2 adj, pertaining to drastic therapy, such as the surgical removal of an organ, limb, or other part of the body.
radical [rad´ĭ-kal]
1. thorough or sweeping; directed to the cause or root of a morbid process.
2. a group of atoms that enters into and goes out of chemical combination without change and that forms one of the fundamental constituents of a molecule.
color radical chromophore.
free radical a radical that carries an unpaired electron; such radicals are extremely reactive, with a very short half-life.
oxygen radical a toxic metabolite of oxygen, such as superoxide or singlet oxygen, capable of damaging microorganisms and normal tissues.
radical,
n 1. a group of atoms that acts together and forms a component of a compound. The group tends to remain bound together when a chemical reaction removes it from one compound and attaches it to another compound. A radical does not exist freely in nature.
adj 2. a drastic measure to cure or prevent the spread of a serious disease, such as the surgical removal of an organ, limb, or other body part.
adj 2. a drastic measure to cure or prevent the spread of a serious disease, such as the surgical removal of an organ, limb, or other body part.
radical
1. directed to the cause; going to the root or source of a morbid process.
2. a group of atoms that enters into and goes out of chemical combination without change and that forms one of the fundamental constituents of a molecule.
free radical
a radical, extremely reactive, and having a very short half-life (10−5 s or less in an aqueous solution), which carries an unpaired electron.
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