signal

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sig·nal

(sig'năl),
1. Something that causes an action or conveys information.
2. A DNA template sequence that alters RNA polymerase transcription.
3. The end product observed when a specific sequence of DNA or RNA is deleted by some method.
4. The message transmitted on binding of an agonist to a receptor.
Farlex Partner Medical Dictionary © Farlex 2012

signal

(sĭg′nəl)
n.
Biology A physical entity, such as a chemical or an electromagnetic wave, that activates a cell receptor and elicits a specific response.
v. sig·naled, sig·naling, sig·nals or sig·nalled or sig·nalling
v.tr.
To cause an effect in (a cell) by the activation of a receptor, as by a neurotransmitter or hormone.

sig′nal·er, sig′nal·ler n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

signal

A measurable or recognisable indicator of an event or process.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

signal

Medtalk A measurable or recognizable indicator of an event or process. See Magnetic resonance signal, Sexual body signal.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

sig·nal

(sig'năl)
1. Something that causes an action.
2. A DNA template sequence that alters RNA polymerase transcription.
3. The end product observed when a specific sequence of DNA or RNA is deleted by some method.
4. Anything or action that communicates something.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Modern signal processing techniques for weak signal detection methods, principally, apply the conventional methods based on time- and frequency-domain techniques.
In this study, the classical bistable potential is used in VR model to enhance weak signals. Other potentials, such as monostable potential, tristable potential, and exponential potential, might be introduced in weak signal enhancement and bearing fault diagnosis.
In the case of a collision, a BEB algorithm will be performed and in the case of a weak signal some parameters such as data rate and transmission power will be tuned.
At present, several studies indicate that coherent integration, noncoherent integration, and differential coherent integration have led to growing acceptance of these weak signal acquisition approaches [4].
However, inductive scenarios are not constrained in the number of emerging weak signal impacts that can be used to form the scenarios.
The Defense Medical Surveillance System, with information on 1.3 million pandemic flu immunizations, and the Veterans Affairs signal detection database, with almost 300,000 vaccination records, both showed a weak signal for thrombocytopenia and idiopathic thrombocytopenia purpura (ITP).
The filtering technology allows the weak signals from trillions of miles away to be picked up by scientists manning the massive telescopes.
Global navigational satellite systems (GNSSs) have a wide variety of applications, including positioning wireless devices, tracking during ionispheric scintillation, and determining the orbit of satellites, all of which involve weak signals. Ziedan (geomatics engineering, U.
Schoemaker's PERIPHERAL VISION: DETECTING THE WEAK SIGNALS THAT WILL MAKE OR BREAK YOUR COMPANY (1422101541 $29.95).
Peripheral Vision: Detecting the weak signals that will make or break your company suggests that all companies have to check their peripheral vision, and improve it to broaden the organizational vision.
Solar-blind devices can communicate with each other by means of extremely weak signals that are difficult for anyone else to monitor, she notes.