brainlet

A subcomponent of a brain or thinking system.

Let's call these five smaller brain units, brainlets: […] Each brainlet is found in a specific part of your thinking brain.

The Prof brainlet is the IT brainlet. The Prof embraces pure logic without the “messiness” of emotion or instinct. To The Prof, everything is objective and impersonal.

The cerebellum.

A small brain; the brain of someone or something small or of someone who is not very intelligent.

...viz. the railway : an invention which is so thoroughly English that, even supposing it likely to have occurred to any slow Prussian brainlet, it would still have been impossible to have found any other nation (excepting perhaps America) with spirit or capital sufficient to have afforded the plan a trial.

But a shade of bygone sorrow, Like a dream upon the morrow, Round his tiny brainlet clinging, Sets the wee cock ever singing,

A dolt; a fool; someone having a small brain.

Still, we have in this country Whig writers—that is, party Whig writers, of the regular party guage, assuring the other little brainlets who believe their writings, that Ruskin is an author of equivalent genius to Jeremy Taylor's—a great man—an intellectual pinnacle—merely because he puts his hand to madnesses, because he abuses Protestantism, and thinks that Christians should not mind their own business, but all other people's businesses— exactly what a Whig of the latter-day school does in office, devising conspiracy bills for French people and sending advice to Germans— which they don't want, and don't take well;

I think he told Claudine the same thing when they met, and convinced the tiny brainlet of his sincerity.