brainy

Very intellectually capable.

She's brainy as well as pretty.

Of or relating to the brain.

You shal vnderstande that there springeth of the brayny substaunce of his for*most Ventrikles, two senewes, […]

There is a hammer and an anuile [within the ear]: whereof the hammer, ſtricking vpon the anuile, muſt of neceſſity beate off ſuch litle partes of the brainy ſteames, as flying about do light and ſticke vpon the toppe of the anuile: […]