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reflex

 - 7 dictionary results
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re⋅flex

  [adj., n. ree-fleks; v. ri-fleks]
Use reflex in a Sentence
–adjective
1. Physiology. noting or pertaining to an involuntary response to a stimulus, the nerve impulse from a receptor being transmitted inward to a nerve center that in turn transmits it outward to an effector.
2. occurring in reaction; responsive.
3. cast back; reflected, as light, color, etc.
4. bent or turned back.
5. designating a radio apparatus in which the same circuit or part performs two functions.
–noun
6. Physiology.
a. Also called reflex act. movement caused by a reflex response.
b. Also called reflex action. the entire physiological process activating such movement.
7. any automatic, unthinking, often habitual behavior or response.
8. the reflection or image of an object, as exhibited by a mirror or the like.
9. a reproduction, as if in a mirror.
10. a copy; adaptation.
11. reflected light, color, etc.
12. Historical Linguistics. an element in a language, as a sound, that has developed from a corresponding element in an earlier form of the language: The (ō) in “stone” is a reflex of Old English ā.
13. a reflex radio receiver.
14. a reflex camera.
–verb (used with object)
15. to subject to a reflex process.
16. to bend, turn, or fold back.
17. to arrange in a reflex system.
Origin:
1500–10; < L reflexus bent back, ptp. of reflectere to reflect

Related forms:
re⋅flex⋅ly, adverb
re⋅flex⋅ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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re·flex   (rē'flěks')   
adj.  

  1. Bent, turned, or thrown back; reflected.

  2. Physiology Being an involuntary action or response, such as a sneeze, blink, or hiccup.

  3. Produced as an automatic response or reaction: reflex opposition to change.

n.  

    1. Something, such as light or heat, that is reflected.

    2. An image produced by reflection.

    3. A copy or reproduction.

  2. Physiology An involuntary response to a stimulus.

  3. Psychology An unlearned or instinctive response to a stimulus.

  4. Linguistics A form or feature that reflects or represents an earlier, often reconstructed, form or feature having undergone phonetic or other change.

tr.v.   (rĭ-flěks') re·flexed, re·flex·ing, re·flex·es

  1. To bend, turn back, or reflect.

  2. To cause to undergo a reflex process.


[From Middle English reflexen, to refract light, bend back, from Latin reflexus, past participle of reflectere, to bend back; see reflect.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

reflex

An action or movement not controlled by conscious thought. A reflex may be anything from a hiccup to the involuntary response of a body part, such as the action that occurs in the knee-jerk reflex.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

reflex  (n.)
1508, "reflection of light," from the verb meaning "refract, deflect" (c.1380), from L.L. reflexus "a bending back," prop. pp. of reflectere (see reflection). Meaning "involuntary nerve stimulation" first recorded 1877, from reflex action (1833). Reflexology as a psychological theory is attested from 1927 (from Ger. reflexologie, 1912); as a foot massage technique, first recorded 1976.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: 1re·flex
Pronunciation: 'rE-"fleks
Function: noun
1 a : reflected heat, light, or color b : a mirroredimage
2 a : an automatic and often inborn response to a stimulus that involves a nerve impulse passing inward from a receptor to a nerve center and thence outward to an effector(as a muscle or gland) without reaching the level of consciousness —compare HABIT 3 b : the process thatculminates in a reflex and comprises reception, transmission, and reaction c reflexes pl : the power of acting or responding with adequate speed

Main Entry: 2reflex
Function: adjective
1 : bent, turned, or directed back : REFLECTED
2 : of, relating to, or produced by a reflex without intervention of consciousness
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

reflex re·flex (rē'flěks')
n.

  1. An involuntary physiological response to a stimulus.

  2. An unlearned or instinctive response to a stimulus.

  3. Something, such as light or heat, that is reflected.

adj.

  1. Being an involuntary action or response, such as a sneeze, blink, or hiccup.

  2. Bent, turned, or thrown back; reflected.

v. re·flexed, re·flex·ing, re·flex·es (rĭ-flěks')

  1. To cause to undergo a reflex process.

  2. To reflect.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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