Wiktionary
n. Work done with the brain; mental effort.
Usage examples of "brainwork".
You just tend to your checking, and leave the brainwork to men who have the equipment.
Some problems we solved with brainwork, some with handwork, some with brutishness the texture of the ink, a mix of soot and varnish and linseed oil, was improved by pissing in it.
Involving neither stress nor brainwork, the job would reawaken no old traumas.
After devoting some ten minutes to steady brainwork she permitted herself the indulgence of a few tears.
But brainwork in pure science is something we can sell, just as we've always sold brainwork in applied sciences.
Max explained, lay not in the fact that WESCAC had fed and bred the sheep itself, instead of doing merely the eugenical brainwork -- though goodness knew this fact was ominous enough when juxtaposed with "Operation Sheepskin"!