close. "Cab" is derived from extracting the first syllable from Steve Caballeros' last name. not just one of the great skaters, his family also invented the modern car and public transportation. so, as you can see, that is why when you rent out half of a taxi, you say, "I'm doin' a 'half cab!'" rather than a ca or an ab, as those are each ⅔ of a cab.
the math starts getting pretty wonky, when you get into renting tiny fractions of caballeros, which is why the Cabernet was invented - to make the entire process more straight forward.
hope that clears up everything!
some lack the courage to self-immolate, so by assisting the creature to reach its peak state, you are making the entire world better. a real twofer!