aletho-, aleth- (Greek: true; nothing concealed; real [from a-, "no, nothing" and letho-, "forgetfullness, oblivion"]).Alethea, Alice: 
A woman's name meaning "truth".
 
alethia: 
A rarely used term for an incapacity to forget past events.
 
alethic: 
Relating to the philosophical concepts of truth and possibility and especially to the branch of logic that formalizes them.
 
alethiology: 
1. The science of the nature of truth and evidence.  
2. The doctrine of truth; that part of logic that is concerned with truth. alethology: 
The study or science of truth.
 
alethoscope: 
An instrument for viewing pictures by means of a lens, so as to give the objects a natural or realistic appearance.
 
alethophobia: 
An abnormal fear of the truth.
 
Alethopteris: 
A genus of fossil ferns, found especially in coal formations [literally, having "true ferns"].
 
philalethia: 
Loving truth; a fondness for truth.
 
philalethist: 
A lover of or a fondness for truth.
 
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