from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or being a pair of postage stamps printed with one upside-down in relation to the other, either deliberately or accidentally.
French : tête, head (from Old French teste, from Late Latin testa, skull; see tester1) + bêche (short for obsolete béchevet, double head of a bed, from Old French : bes-, twice from Latin bis; see bis + chevet from Late Latin capitium, opening for the head in a tunic, from Latin, head covering, from caput, capit-, head; see triceps).(American Heritage® Dictionary of the English Language, Fourth Edition)