n. A person who is sexually attracted to intelligent people.
Other Forms
"Sapiosexual" is a relatively new word that refers to a person who is erotically attracted to intelligence.
—Rob Brezsny, “Free Will Astrology: November 21-27, 2012,” The Village Voice, November 21, 2012
NOW relocated to Paris after years living in Co. Kildare, husky-voiced chanteuse Marianne Faithfull speaks enthusiastically of a little-known entry in the lexicon of love. The 65-year-old says: 'There is this fantastic new term and I really hope it exists. It's "sapiosexual"… It means being attracted sexually to people's minds as well as their bodies. And there was a lot of it around in the Sixties, let me tell you.'
—Isaac Bickerstaffe, “Now relocated to Paris after…,” Irish Daily Mail, April 24, 2012
2003 (earliest)
Here's an e-mail that I sent out a while back on what I mean by sapiosexual….

I want an incisive, inquisitive, insightful, irreverent mind. I want someone for whom philosophical discussion is foreplay. …I decided all that means that I am sapiosexual….I invented this term while on too little sleep driving up from SF in the summer of '98.
—Torin/Darren WhoEver, “Stoked on sapiosexuality,” LiveJournal, March 15, 2003
This term is more or less a blend of the adjectives sapient (wise or sagacious; cf. homo sapiens) and sexual, with an o shoehorned in to mirror terms such as heterosexual and homosexual.