Dictionary.com/noetic:

noetic (n-tk) adjective

Of, relating to, originating in, or apprehended by the intellect.

[Greek notikos, from nosis, understanding. See noesis.]

Source: The American Heritage® Dictionary of the English Language, Fourth Editio
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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adj : of or associated with or requiring the use of the mind; “intellectual problems”; “the triumph of the rational over the animal side of man” [syn: intellectual, rational]

Source: WordNet ® 2.0, © 2003 Princeton University

Dust off those old text books, dig out that neglected slide-rule and do something noetic with this week's word! From mad scientists to bookish children, this word should prove to bring out some interesting if not seemingly boring characters. Have fun!