detect

[dih-tekt]
verb (used with object)
1.
to discover or catch (a person) in the performance of some act: to detect someone cheating.
2.
to discover the existence of: to detect the odor of gas.
3.
to find out the true character or activity of: to detect a spy.
4.
Telecommunications.
a.
to rectify alternating signal currents in a radio receiver.
b.
to demodulate.

Origin:
1400–50; late Middle English < Latin dētēctus (past participle of dētegere), equivalent to dē- de- + teg(ere) to cover + -tus past participle suffix

detectable, detectible, adjective
detectability, detectibility, noun
predetect, verb (used with object)
undetectable, adjective
undetectably, adverb
undetected, adjective
undetectible, adjective


2. See learn.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To undetectable
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World English Dictionary
detect (dɪˈtɛkt)
 
vb
1.  to perceive or notice: to detect a note of sarcasm
2.  to discover the existence or presence of (esp something likely to elude observation): to detect alcohol in the blood
3.  to extract information from (an electromagnetic wave)
4.  obsolete to reveal or expose (a crime, criminal, etc)
 
[C15: from Latin dētectus uncovered, from dētegere to uncover, from de- + tegere to cover]
 
de'tectable
 
adj
 
de'tectible
 
adj
 
de'tecter
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

detect
mid-15c., from L. detectus, pp. of detegere "uncover, disclose," from de- "un-, off" + tegere "to cover" (see stegosaurus).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences for undetectable
After regeneration is complete, the damage is undetectable, even microscopically.
The idea of being unseen and hence undetectable has fascinated mankind for generations.
It also appears to render the contents invisible and undetectable in other ways.
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